Nouveau - Oct 2013 - [Bug 70354] New: Failed to initialise context object: 2D_NVC0 (0) (for my GeForce GT 750M)

https://bugs.freedesktop.org/show_bug.cgi?id=70354

          Priority: medium
            Bug ID: 70354
          Assignee: nouveau at lists.freedesktop.org
           Summary: Failed to initialise context object: 2D_NVC0 (0) (for
                    my GeForce GT 750M)
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: fred.new2911 at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

Created attachment 87411
  --> https://bugs.freedesktop.org/attachment.cgi?id=87411&action=edit
Xorg.0.log

It looks like my new HP Envy 17, Intel Core i7-4702MQ (Haswell), Nvidia GeForce
GT 750M is a little too bleeding edge. Initialisation of the GT 750M fails and
the integrated graphics controller is used.

My operating system is Fedora 20 (beta) with Linux kernel
3.11.3-301.bz105920.fc20.x86_64. This is the 3.11.3-301.fc20.x86_64 kernel with
two patches from freedesktop bug 70208 applied - patches from comment 6 and
comment 10.

The xorg nouveau driver from Fedora is
xorg-x11-drv-nouveau-1.0.9-2.fc20.x86_64.

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--- Comment #1 from Fred New <fred.new2911 at gmail.com> ---
Created attachment 87412
  --> https://bugs.freedesktop.org/attachment.cgi?id=87412&action=edit
dmesg

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--- Comment #2 from Ilia Mirkin <imirkin at alum.mit.edu> ---
This bug appears to be identical to the later issue presented in #70208
(comment 15) -- of which you were aware since you even posted in that issue.
What was your motivation for opening a separate issue?

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--- Comment #3 from Fred New <fred.new2911 at gmail.com> ---
Sorry, reading the comments in bug 70208, I was under the impression that the
vbios problem was resolved and a new bug was needed to resolve the next problem
that appeared. Feel free to close this as duplicate if that isn't the case.

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--- Comment #4 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Erm, you're right. My bad. Let's keep this separate. I'll put up a
note in the
other issue.

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Failed to initialise        |[NVE7] Failed to initialise
                   |context object: 2D_NVC0 (0) |context object: 2D_NVC0 (0)
                   |(for my GeForce GT 750M)    |(for my GeForce GT 750M)

--- Comment #5 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Looks like a PGRAPH init failure, here's the relevant bit:

[   34.393155] nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT
at 0x300000 [ IBUS ]
[   34.393201] nouveau E[   PIBUS][0000:01:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[   36.395442] nouveau E[  PGRAPH][0000:01:00.0] HUB_INIT timed out
[   36.395451] nouveau E[  PGRAPH][0000:01:00.0] 409000 - done 0x00000244
[   36.395462] nouveau E[  PGRAPH][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   36.395472] nouveau E[  PGRAPH][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[   36.395477] nouveau E[  PGRAPH][0000:01:00.0] 502000 - done 0x00000300
[   36.395484] nouveau E[  PGRAPH][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   36.395490] nouveau E[  PGRAPH][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   36.395492] nouveau E[  PGRAPH][0000:01:00.0] init failed, -16

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--- Comment #6 from 4712.joey at gmail.com ---
Think I have the same problem on my Geforce GT 750M on Asus N750JV laptop.

I'm using Manjaro Linux and tried it with Kernel 3.11 and 3.12. 

After fixing the loading of the vbios (see
https://bugs.freedesktop.org/show_bug.cgi?id=70208) I get the following
message:

 Failed to initialise context object: 2D_NVC0 (0)

When I extract the firmware and load the nouveau kernel module with
config=NvGrUseFw=1 I'm getting this error on dmesg when starting X:

 [   43.161759] nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT
at 0x300000 [ IBUS ]
 [   43.161803] nouveau E[   PIBUS][0000:01:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
 [   45.164110] nouveau E[  PGRAPH][0000:01:00.0] fuc09 req 0x10 timeout
 [   45.164114] nouveau E[  PGRAPH][0000:01:00.0] init failed, -16


I will attach the full dmesg for both kernels, with and without using external
firmware. Please also note that I extracted the firmware myself and I'm not
sure if the generated firmware files are correct.

In addition I will send mmiotrace of the working nvidia blob driver to mmio dot
dumps at gmail dot com.

If you need more information or if I can support you in any way having a closer
look at this, please just let me know :-)

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--- Comment #7 from 4712.joey at gmail.com ---
(In reply to comment #6)

Without external firmware (without config=NvGrUseFw=1) the dmesg when starting
X looks like this: (very similar to the one reported above, as far as I can
see)


[  969.762998] nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT
at 0x300000 [ IBUS ]
[  969.763048] nouveau E[   PIBUS][0000:01:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[  971.764879] nouveau E[  PGRAPH][0000:01:00.0] HUB_INIT timed out
[  971.764886] nouveau E[  PGRAPH][0000:01:00.0] 409000 - done 0x00000244
[  971.764896] nouveau E[  PGRAPH][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[  971.764906] nouveau E[  PGRAPH][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[  971.764909] nouveau E[  PGRAPH][0000:01:00.0] 502000 - done 0x00000300
[  971.764915] nouveau E[  PGRAPH][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[  971.764920] nouveau E[  PGRAPH][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[  971.764922] nouveau E[  PGRAPH][0000:01:00.0] init failed, -16

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--- Comment #8 from 4712.joey at gmail.com ---
Created attachment 87530
  --> https://bugs.freedesktop.org/attachment.cgi?id=87530&action=edit
Full dmesg on linux-3.12-rc4 - without config=NvGrUseFw=1

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--- Comment #9 from 4712.joey at gmail.com ---
Created attachment 87531
  --> https://bugs.freedesktop.org/attachment.cgi?id=87531&action=edit
Full dmesg on linux-3.12-rc4 - with config=NvGrUseFw=1

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--- Comment #10 from 4712.joey at gmail.com ---
Created attachment 87532
  --> https://bugs.freedesktop.org/attachment.cgi?id=87532&action=edit
Full dmesg on linux-3.11.4-1 - without config=NvGrUseFw=1

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--- Comment #11 from 4712.joey at gmail.com ---
Created attachment 87533
  --> https://bugs.freedesktop.org/attachment.cgi?id=87533&action=edit
Full dmesg on linux-3.11.4-1 - with config=NvGrUseFw=1

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--- Comment #12 from Joey 4712 <4712.joey at gmail.com> ---
I've sent the mmiotrace to mmio dot dumps at gmail dot com.

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--- Comment #13 from Ivan Havlicek <ivan at modulix.org> ---
Hi,

I have same issue (kernel-3.11.6), my card is a GeForce GTX 765M (10de:11e2).
I'm also ready to help if needed, my log :

$ dmesg | grep -i -e nouveau -e drm
[    4.607166] [drm] Initialized drm 1.1.0 20060810
[    4.656791] [drm] Memory usable by graphics device = 2048M
[    4.656796] fb: conflicting fb hw usage inteldrmfb vs VESA VGA - removing
generic driver
[    5.235194] fb: conflicting fb hw usage inteldrmfb vs VGA16 VGA - removing
generic driver
[    5.249530] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[    5.249533] [drm] Driver supports precise vblank timestamp query.
[    5.300252] fbcon: inteldrmfb (fb0) is primary device
[    6.727359] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[    8.082531] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[    8.084219] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor
0
[    8.085730] nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x0e6220a1
[    8.085770] nouveau  [  DEVICE][0000:01:00.0] Chipset: GK106 (NVE6)
[    8.085771] nouveau  [  DEVICE][0000:01:00.0] Family : NVE0
[    8.086406] nouveau  [   VBIOS][0000:01:00.0] checking PRAMIN for image...
[    8.134605] nouveau  [   VBIOS][0000:01:00.0] ... signature not found
[    8.134696] nouveau  [   VBIOS][0000:01:00.0] checking PROM for image...
[    8.309024] nouveau  [   VBIOS][0000:01:00.0] ... appears to be valid
[    8.310003] nouveau  [   VBIOS][0000:01:00.0] using image from PROM
[    8.311106] nouveau  [   VBIOS][0000:01:00.0] BIT signature found
[    8.312066] nouveau  [   VBIOS][0000:01:00.0] version 80.06.5b.00.05
[    8.313602] nouveau  [ DEVINIT][0000:01:00.0] adaptor not initialised
[    8.314594] nouveau  [   VBIOS][0000:01:00.0] running init tables
[    8.419401] nouveau  [     PFB][0000:01:00.0] RAM type: GDDR5
[    8.420382] nouveau  [     PFB][0000:01:00.0] RAM size: 2048 MiB
[    8.421371] nouveau  [     PFB][0000:01:00.0]    ZCOMP: 0 tags
[    8.445223] nouveau  [  PTHERM][0000:01:00.0] FAN control: none / external
[    8.446209] nouveau  [  PTHERM][0000:01:00.0] fan management: disabled
[    8.447206] nouveau  [  PTHERM][0000:01:00.0] internal sensor: yes
[    8.487489] nouveau  [     DRM] VRAM: 2048 MiB
[    8.488465] nouveau  [     DRM] GART: 1048576 MiB
[    8.489437] nouveau E[     DRM] Pointer to TMDS table invalid
[    8.490396] nouveau  [     DRM] DCB version 4.0
[    8.491369] nouveau E[     DRM] Pointer to flat panel table invalid
[    8.492335] nouveau W[     DRM] voltage table 0x50 unknown
[    8.493301] nouveau  [     DRM] 3 available performance level(s)
[    8.494246] nouveau  [     DRM] 0: core 202MHz shader 405MHz memory 405MHz
voltage 100mV
[    8.495207] nouveau  [     DRM] 1: core 405MHz shader 810MHz memory 1080MHz
voltage 80mV
[    8.496147] nouveau  [     DRM] 3: core 1002MHz shader 2004MHz memory
1080MHz voltage 40mV
[    8.497098] nouveau  [     DRM] c:
[    8.509834] nouveau  [     DRM] MM: using COPY for buffer copies
[    8.510744] [drm] Initialized nouveau 1.1.1 20120801 for 0000:01:00.0 on
minor 1
[    8.645176] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000 FAULT
at 0x418880 [ IBUS ]
[    8.645188] nouveau E[   PIBUS][0000:01:00.0] GPC2: 0x419f74 0x00000555
(0x3800820c)
[    8.645321] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000001 FAULT
at 0x503018 [ IBUS ]
[    8.645360] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000002 FAULT
at 0x4188ac [ IBUS ]
[    8.645389] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0xbadf1008 FAULT
at 0x419cc0 [ IBUS ]
[    8.645399] nouveau E[   PIBUS][0000:01:00.0] GPC2: 0x419cc0 0xbadf1008
(0x3800820c)
[    8.645547] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0xbadf1000 FAULT
at 0x419eb4 [ IBUS ]
[    8.645564] nouveau E[   PIBUS][0000:01:00.0] GPC2: 0x419eb4 0xbadf1000
(0x3800820c)
[   10.648199] nouveau E[  PGRAPH][0000:01:00.0] HUB_INIT timed out
[   10.648204] nouveau E[  PGRAPH][0000:01:00.0] 409000 - done 0x00000244
[   10.648208] nouveau E[  PGRAPH][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   10.648212] nouveau E[  PGRAPH][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[   10.648214] nouveau E[  PGRAPH][0000:01:00.0] 502000 - done 0x00000300
[   10.648220] nouveau E[  PGRAPH][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   10.648226] nouveau E[  PGRAPH][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   10.648228] nouveau E[  PGRAPH][0000:01:00.0] 50a000 - done 0x00000300
[   10.648234] nouveau E[  PGRAPH][0000:01:00.0] 50a000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   10.648239] nouveau E[  PGRAPH][0000:01:00.0] 50a000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   10.648242] nouveau E[  PGRAPH][0000:01:00.0] 512000 - done 0x00000300
[   10.648247] nouveau E[  PGRAPH][0000:01:00.0] 512000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   10.648253] nouveau E[  PGRAPH][0000:01:00.0] 512000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   10.648255] nouveau E[  PGRAPH][0000:01:00.0] init failed, -16

which results in this error while runing Xorg :

[     8.621] (II) NOUVEAU(G0): Opened GPU channel 0
[    10.622] (EE) NOUVEAU(G0): Failed to initialise context object: 2D_NVC0 (0)
[    10.622] (EE) NOUVEAU(G0): Error initialising acceleration.  Falling back
to NoAccel

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--- Comment #14 from Martin <martin.kaffanke at gmx.at> ---
This is my bug I think, but i got some more dmesg messages, as far as I can
see, I'll try to upload...

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--- Comment #15 from Martin <martin.kaffanke at gmx.at> ---
Created attachment 88738
  --> https://bugs.freedesktop.org/attachment.cgi?id=88738&action=edit
another dmesg with some more messages at the end

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--- Comment #16 from Emil Velikov <emil.l.velikov at gmail.com> ---
(In reply to comment #14)
> This is my bug I think, but i got some more dmesg messages, as far as I can
> see, I'll try to upload...
Your card and dmesg output is very different from the one(s) concentrated in
this bug report.
I would suggest taking a look at our wiki [1] [2] and filling a separate bug.

[1] http://nouveau.freedesktop.org/wiki/Bugs/
[2] http://nouveau.freedesktop.org/wiki/TroubleShooting/

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--- Comment #17 from Ilia Mirkin <imirkin at alum.mit.edu> ---
If any of you are up for it, there's a HUB_INIT timeout fix in Ben's
repository. It's set up as an out-of-tree module:

git clone git://people.freedesktop.org/~darktama/nouveau
cd nouveau/drm; make

That should create a nouveau.ko that you can use. The tree it will compile
against probably has to be 3.13-rc1+. (You can also port the patches over to
the linux tree with a bunch of sed work.)

P.S. The patch in question is:
http://cgit.freedesktop.org/~darktama/nouveau/commit/?id=0c463bb767a0af0781256ec118c5890077c2f46c

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--- Comment #18 from Joey 4712 <4712.joey at gmail.com> ---
Created attachment 90760
  --> https://bugs.freedesktop.org/attachment.cgi?id=90760&action=edit
Full dmesg on linux-3.13.0-1 - loading nouveau.ko built from Ben's
repository

Thanks or your information about the HUB_INIT timeout fix in Ben's
repository.

I tried it for Geforce GT 750M on Asus N750JV laptop on linux-3.13.0-1 but the
module fails to load with a lot of messages like "nouveau: Unknown symbol
ttm_bo_mmap (err 0)".

Attaching full dmesg output.

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--- Comment #19 from Joey 4712 <4712.joey at gmail.com> ---
Sorry for posting too quickly: found it myself, I only had to "modprobe
ttm"
first to fix these "Unknown symbol ttm_bo_mmap..." errors.

No the nouveau.ko from ben's repo loads successfully but I'm getting the
HUB_INIT timed out message again:

[   99.171109] [drm] Initialized nouveau 1.1.1 20120801 for 0000:01:00.0 on
minor 1
[   99.314206] nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT
at 0x300000 [ IBUS ]
[   99.314232] nouveau E[   PIBUS][0000:01:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[   99.314464] nouveau E[   PIBUS][0000:01:00.0] HUB0: 0x404170 0x00000012
(0x0e008201)
[  101.316059] nouveau E[  PGRAPH][0000:01:00.0] HUB_INIT timed out

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--- Comment #20 from Joey 4712 <4712.joey at gmail.com> ---
Btw: The commit message of the patch says it is for GK110/GK208 but the GT 750M
this bug is about is a GK107, am I right? Should the patch also work for GK107
or is it possible to make it work for GK107 as well?

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[NVE7] Failed to initialise |[NVE6,NVE7] HUB_INIT
                   |context object: 2D_NVC0 (0) |timeout on graph init, blob
                   |(for my GeForce GT 750M)    |fw doesn't help

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--- Comment #21 from Ben Skeggs <skeggsb at gmail.com> ---
Created attachment 95131
  --> https://bugs.freedesktop.org/attachment.cgi?id=95131&action=edit
probably "fix"

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--- Comment #22 from Joey 4712 <4712.joey at gmail.com> ---
Thanks soooo much.

It's working now with you patch applied against Linux 3.13 Kernel source on
Manjaro Linux.

  $ xrandr --setprovideroffloadsink nouveau Intel
  $ DRI_PRIME=1 glxgears -info
  Running synchronized to the vertical refresh.  The framerate should be
  approximately the same as the monitor refresh rate.
  GL_RENDERER   = Gallium 0.4 on NVE7
  GL_VERSION    = 3.0 Mesa 10.0.3
  GL_VENDOR     = nouveau

Do you need any more info? Like dmesg of the now working nouveau setup?

Once again, thanks to all of you!

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--- Comment #23 from Richard <rich at warfaresdl.com> ---
Same issue on a Lenovo Y510P. Tried compiling the module from Ben's git
sources
in comment 17 on a 3.13.5 kernel, but it complains:

/hidden_tmp/nouveau/drm/core/subdev/mxm/base.c:109:2: error: implicit
declaration of function ?acpi_evaluate_dsm?
[-Werror=implicit-function-declaration]

grep -R acpi_evaluate_dsm /usr/src/linux/* comes up with nothing, so I'm
guessing this function disappeared?

Also tried simply applying the patch (link in comment 17) to a copy of my
source tree, and I seem to be missing (at least) the
"engine/graph/fuc/hubnv108.fuc5.h" file in my source tree.

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--- Comment #24 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to comment #23)
> Same issue on a Lenovo Y510P. Tried compiling the module from Ben's git
> sources in comment 17 on a 3.13.5 kernel, but it complains:
> 
> /hidden_tmp/nouveau/drm/core/subdev/mxm/base.c:109:2: error: implicit
> declaration of function ?acpi_evaluate_dsm?
> [-Werror=implicit-function-declaration]
> 
> grep -R acpi_evaluate_dsm /usr/src/linux/* comes up with nothing, so
I'm
> guessing this function disappeared?
More like 'appeared'. That tree is against the ~latest kernel (3.14-rcX
right
now).
> 
> Also tried simply applying the patch (link in comment 17) to a copy of my
> source tree, and I seem to be missing (at least) the
> "engine/graph/fuc/hubnv108.fuc5.h" file in my source tree.
Check the patch in comment 21 (attachment 95131). It's not in Ben's git
repo,
since he's not sure what effect it'll have on other cards.

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D. Moens <d-bugzilla at moens.cc> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |d-bugzilla at moens.cc

--- Comment #25 from D. Moens <d-bugzilla at moens.cc> ---
Experiencing the same issue on a Dell M4800 QHD+ (NVE6).

- Fedora rawhide :
kernel-3.14.0-0.rc7.git0.1.fc21.x86_64
xorg-x11-server-Xorg-1.15.0-5.fc21.x86_64
xorg-x11-drv-nouveau-1.0.10-1.fc21.x86_64

- lscpi :
01:00.0 VGA compatible controller: NVIDIA Corporation GK106GLM [Quadro K2100M]
(rev a1)

- Kernel command line:
BOOT_IMAGE=/vmlinuz-rawhide-nouveau root=/dev/mapper/vg01-rootfs4 ro
rd.lvm.lv=vg01/rootfs4 vconsole.font=latarcyrheb-sun16 LANG=en_US.UTF-8
nouveau.debug=PDISP=debug,VBIOS=trace drm.debug=0xe


- Recompiled latest http://cgit.freedesktop.org/~darktama/nouveau/ as of
2014-03-18 :

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--- Comment #26 from D. Moens <d-bugzilla at moens.cc> ---
(In reply to comment #25)
> Experiencing the same issue on a Dell M4800 QHD+ (NVE6).
Argh, my apologies.
Please disregard comment #25 (filed under bug #76319).

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--- Comment #27 from D. Moens <d-bugzilla at moens.cc> ---
Created attachment 96836
  --> https://bugs.freedesktop.org/attachment.cgi?id=96836&action=edit
dmesg | egrep -i "nouveau|drm"

Testing with GK106GLM [Quadro K2100M], QHD+ (3200x1800) screen.

MMIO FAULT is reproducible with kernel 3.14 & darktama's git 
633e16bb8571071b9da8ed03513a2266cbf21eb5.

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--- Comment #28 from Paul Bredbury <brebs at sent.com> ---
Seems fixed with kernel 3.15-rc6, and in bootloader:

rcutree.rcu_idle_gp_delay=1

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buhman <zack at buhman.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |zack at buhman.org

--- Comment #29 from buhman <zack at buhman.org> ---
*** Bug 80627 has been marked as a duplicate of this bug. ***

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--- Comment #30 from Karol Herbst <karolherbst at me.com> ---
I have the strange problem, that it sometimes seems to not happen. Uploading a
kernel log file for that case. But every other 9 in 10 times I got this
HUB_INIT timeout instead.

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--- Comment #31 from Karol Herbst <karolherbst at me.com> ---
Created attachment 105421
  --> https://bugs.freedesktop.org/attachment.cgi?id=105421&action=edit
kernel log file in case it doesn't HUB_INIT timeout

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--- Comment #32 from Karol Herbst <karolherbst at me.com> ---
Created attachment 106964
  --> https://bugs.freedesktop.org/attachment.cgi?id=106964&action=edit
mmiotrace when module loads sucessfully

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--- Comment #33 from Karol Herbst <karolherbst at me.com> ---
Created attachment 106965
  --> https://bugs.freedesktop.org/attachment.cgi?id=106965&action=edit
mmiotrace when failing

the diff between both traces is quite interessting. Both happend on the same
machine, the same kernel and the same nouveau.ko file on the same gpu.

Especially the part in the failing trace starting with this:

"[0] 0.000000, FB32 28c <= 1
[0] 0.000000, FB32 219010 => 0
[0] 0.000000, FB32 219010 => 0
[0] 0.000000, FB32 219010 => 0
[0] 0.000000, FB32 219010 => 0
[0] 0.000000, FB32 219010 => 0
[0] 0.000000, FB32 219010 => 0
[0] 0.000000, FB32 219010 => 0
[0] 0.000000, FB32 219010 => 0
[0] 0.000000, FB32 219010 => 0
[0] 0.000000, FB32 219010 => 0
[0] 0.000000, FB32 219010 => 0
... until timeout
"

because this part never happen in the "working" trace

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--- Comment #34 from bruno.pagani at ens-lyon.org ---
Per bug 87942, it seems I’m affected too (Dell XPS 9530, GT750M).

And rcutree.rcu_idle_gp_delay=1 doesn’t fix this for me, I’m running with this
for a while because nvidia needs it, but it doesn’t change anything for
nouveau.

Is Ben’s patch still working for everyone here (I have not tested it myself,
since I’m not sure on how to do so), and if so is there a chance it will land
somewhere in the future?

Or is there another solution to try?

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--- Comment #35 from nshp at protonmail.ch ---
Bruno, the patch does not seem to help (at least for me).
I also have this issue with GK107. Not sure if there's anything useful in
this
kernel log, I just tried ignoring the HUB_INIT timeout to see if it spat out
anything more interesting: http://ix.io/fzc

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--- Comment #36 from Vitaly Torshyn <vitaly.torshyn at gmail.com> ---
Created attachment 112418
  --> https://bugs.freedesktop.org/attachment.cgi?id=112418&action=edit
Xorg log

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--- Comment #37 from Vitaly Torshyn <vitaly.torshyn at gmail.com> ---
Created attachment 112419
  --> https://bugs.freedesktop.org/attachment.cgi?id=112419&action=edit
dmesg

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--- Comment #38 from Vitaly Torshyn <vitaly.torshyn at gmail.com> ---
Created attachment 112420
  --> https://bugs.freedesktop.org/attachment.cgi?id=112420&action=edit
lspci -v

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--- Comment #39 from Vitaly Torshyn <vitaly.torshyn at gmail.com> ---
Hi folks,
Please see previously attached dmesg and xorg logs.
I was using Ben's git repo to apply a patch for 3.18.2 kernel.
Actually, the patch is only removed INIT HUB error. In addition, X was managed
to start with AIGLX enabled but nouveau crashed on start any GL enabled
application.
Please note, the same behavior with SLI enabled. 
HW is Lenovo Y510P with dual GT 755M video.

Please, feel free to request additional information.

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--- Comment #40 from aidan at jmad.org ---
(In reply to Vitaly Torshyn from comment #39)
> Hi folks,
> Please see previously attached dmesg and xorg logs.
> I was using Ben's git repo to apply a patch for 3.18.2 kernel.
> Actually, the patch is only removed INIT HUB error. In addition, X was
> managed to start with AIGLX enabled but nouveau crashed on start any GL
> enabled application.
> Please note, the same behavior with SLI enabled. 
> HW is Lenovo Y510P with dual GT 755M video.
> 
> Please, feel free to request additional information.
I have a similar laptop, and I think the X crashing is this
(https://bugs.freedesktop.org/show_bug.cgi?id=88514) issue.

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--- Comment #41 from Karol Herbst <karolherbst at me.com> ---
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/patch/?id=74b51ee152b6d99e61ba329799a039453fb9438f
this kernel patch fixed the PGRAPH timeout issue

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--- Comment #42 from Karol Herbst <karolherbst at me.com> ---
at least this patch made it more likely to suceed for me.

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--- Comment #43 from Vitaly Torshyn <vitaly.torshyn at gmail.com> ---
(In reply to aidan from comment #40)
> (In reply to Vitaly Torshyn from comment #39)
> > Hi folks,
> > Please see previously attached dmesg and xorg logs.
> > I was using Ben's git repo to apply a patch for 3.18.2 kernel.
> > Actually, the patch is only removed INIT HUB error. In addition, X was
> > managed to start with AIGLX enabled but nouveau crashed on start any
GL
> > enabled application.
> > Please note, the same behavior with SLI enabled. 
> > HW is Lenovo Y510P with dual GT 755M video.
> > 
> > Please, feel free to request additional information.
> 
> I have a similar laptop, and I think the X crashing is this
> (https://bugs.freedesktop.org/show_bug.cgi?id=88514) issue.
I don't think so. The X crashing even with second nvidia GPU installed. In
case
intel gpu is turned off by notebooks firmware.

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--- Comment #44 from Vitaly Torshyn <vitaly.torshyn at gmail.com> ---
(In reply to Karol Herbst from comment #42)
> at least this patch made it more likely to suceed for me.
Have you tested it? Are sure it doesn't break other ACPI related stuff?
It's weird to fix ACPI stuff for our cards.
Also, please respond if you applied this fix with Ben's fixes.

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--- Comment #45 from bruno.pagani at ens-lyon.org ---
(In reply to Vitaly Torshyn from comment #43)
> (In reply to aidan from comment #40)
> > (In reply to Vitaly Torshyn from comment #39)
> > > Hi folks,
> > > Please see previously attached dmesg and xorg logs.
> > > I was using Ben's git repo to apply a patch for 3.18.2
kernel.
> > > Actually, the patch is only removed INIT HUB error. In addition,
X was
> > > managed to start with AIGLX enabled but nouveau crashed on start
any GL
> > > enabled application.
> > > Please note, the same behavior with SLI enabled. 
> > > HW is Lenovo Y510P with dual GT 755M video.
> > > 
> > > Please, feel free to request additional information.
> > 
> > I have a similar laptop, and I think the X crashing is this
> > (https://bugs.freedesktop.org/show_bug.cgi?id=88514) issue.
> 
> I don't think so. The X crashing even with second nvidia GPU installed.
In
> case intel gpu is turned off by notebooks firmware.
I don’t understand your message Vitaly, but I think he is right, this is the
same bug. I’m having the same symptoms he has.

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--- Comment #46 from Vitaly Torshyn <vitaly.torshyn at gmail.com> ---
(In reply to bruno.pagani from comment #45)
> (In reply to Vitaly Torshyn from comment #43)
> > (In reply to aidan from comment #40)
> > > (In reply to Vitaly Torshyn from comment #39)
> > > > Hi folks,
> > > > Please see previously attached dmesg and xorg logs.
> > > > I was using Ben's git repo to apply a patch for 3.18.2
kernel.
> > > > Actually, the patch is only removed INIT HUB error. In
addition, X was
> > > > managed to start with AIGLX enabled but nouveau crashed on
start any GL
> > > > enabled application.
> > > > Please note, the same behavior with SLI enabled. 
> > > > HW is Lenovo Y510P with dual GT 755M video.
> > > > 
> > > > Please, feel free to request additional information.
> > > 
> > > I have a similar laptop, and I think the X crashing is this
> > > (https://bugs.freedesktop.org/show_bug.cgi?id=88514) issue.
> > 
> > I don't think so. The X crashing even with second nvidia GPU
installed. In
> > case intel gpu is turned off by notebooks firmware.
> 
> I don’t understand your message Vitaly, but I think he is right, this is
the
> same bug. I’m having the same symptoms he has.
Sorry, I wasn't clear in my earlier message. I have an SLI enabled laptop
and
second GPU can be removed. Without second GPU intel's GPU is turned on by
BIOS
(firmware). 
So, X crashed with/without second GPU.

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--- Comment #47 from bruno.pagani at ens-lyon.org ---
(In reply to Vitaly Torshyn from comment #46)
> (In reply to bruno.pagani from comment #45)
> > (In reply to Vitaly Torshyn from comment #43)
> > > (In reply to aidan from comment #40)
> > > > (In reply to Vitaly Torshyn from comment #39)
> > > > > Hi folks,
> > > > > Please see previously attached dmesg and xorg logs.
> > > > > I was using Ben's git repo to apply a patch for
3.18.2 kernel.
> > > > > Actually, the patch is only removed INIT HUB error. In
addition, X was
> > > > > managed to start with AIGLX enabled but nouveau crashed
on start any GL
> > > > > enabled application.
> > > > > Please note, the same behavior with SLI enabled. 
> > > > > HW is Lenovo Y510P with dual GT 755M video.
> > > > > 
> > > > > Please, feel free to request additional information.
> > > > 
> > > > I have a similar laptop, and I think the X crashing is this
> > > > (https://bugs.freedesktop.org/show_bug.cgi?id=88514) issue.
> > > 
> > > I don't think so. The X crashing even with second nvidia GPU
installed. In
> > > case intel gpu is turned off by notebooks firmware.
> > 
> > I don’t understand your message Vitaly, but I think he is right, this
is the
> > same bug. I’m having the same symptoms he has.
> 
> Sorry, I wasn't clear in my earlier message. I have an SLI enabled
laptop
> and second GPU can be removed. Without second GPU intel's GPU is turned
on
> by BIOS (firmware). 
> So, X crashed with/without second GPU.
OK, I think you’re the only one with a SLI laptop. Every one else here seems to
have an Intel+NVIDIA setup, without being able to deactivate Intel.

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--- Comment #48 from Karol Herbst <karolherbst at me.com> ---
(In reply to Vitaly Torshyn from comment #44)
> (In reply to Karol Herbst from comment #42)
> > at least this patch made it more likely to suceed for me.
> 
> Have you tested it? Are sure it doesn't break other ACPI related stuff?
> It's weird to fix ACPI stuff for our cards.
> Also, please respond if you applied this fix with Ben's fixes.
no, I don't use Ben's fixes, because I wanted to try this patch out
allone. The
thing is, that for me nouveau fails most of the time loading my card, but with
this patch it seems to be more likely to succeed, allthough it may be not
related, but it kinda helped me.

On a side note: if it succeeds the kernel moudle is loaded under a second, so
it is far bellow the timeout.

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--- Comment #49 from Karol Herbst <karolherbst at me.com> ---
(In reply to Vitaly Torshyn from comment #44)
> (In reply to Karol Herbst from comment #42)
> > at least this patch made it more likely to suceed for me.
> 
> Have you tested it? Are sure it doesn't break other ACPI related stuff?
> It's weird to fix ACPI stuff for our cards.
> Also, please respond if you applied this fix with Ben's fixes.
Also note that rcutree.rcu_idle_gp_delay=1 helped for some and the kernel patch
tries to make this not needed anymore. So it kinda makes sense, even if not for
all.

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--- Comment #50 from Karol Herbst <karolherbst at me.com> ---
And no, Ben's patch doesn't help me at all.

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--- Comment #51 from Richard <rich at warfaresdl.com> ---
(In reply to bruno.pagani from comment #47)
> OK, I think you’re the only one with a SLI laptop. Every one else here
seems
> to have an Intel+NVIDIA setup, without being able to deactivate Intel.
I wouldn't say he's the only one... I have the same setup myself
(comment 23).
I have noted that the nouveau module loads reliably with no patches since at
least kernel 3.16.x (well after my original post), but it does go nuts whenever
I do anything with opengl. I haven't attempted to capture logs when it does
this - it shoots the CPU up to near 100% and becomes nearly unresponsive. I
usually have to shut it down hard to recover (and I'm careful now to only
load
the nvidia driver when I intend to do opengl, and nouveau at all other times).

(Not related to this bug: I haven't been able to get it to fire up with SLI
enabled (even with nvidia driver) outside of windows. Vitaly, was there
anything special you had to do to get SLI working on your Y510P?)

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--- Comment #52 from Richard <rich at warfaresdl.com> ---
I think I should update my post... I should say that nouveau loads reliably,
but I still get the HUB_INIT timeout error from the OP. Applying the patch does
not fix it. The driver works for 2D applications, but 3D applications cause it
to hang the GPU.

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--- Comment #53 from bruno.pagani at ens-lyon.org ---
Using 3.19, little changes from RCU patches, but still no luck.

[  173.852656] nouveau  [  DEVICE][0000:02:00.0] BOOT0  : 0x0e7240a2
[  173.852658] nouveau  [  DEVICE][0000:02:00.0] Chipset: GK107 (NVE7)
[  173.852659] nouveau  [  DEVICE][0000:02:00.0] Family : NVE0
[  173.867029] nouveau  [   VBIOS][0000:02:00.0] using image from ACPI
[  173.867119] nouveau  [   VBIOS][0000:02:00.0] BIT signature found
[  173.867121] nouveau  [   VBIOS][0000:02:00.0] version 80.07.b3.00.21
[  173.867339] nouveau  [ DEVINIT][0000:02:00.0] adaptor not initialised
[  173.867370] nouveau  [   VBIOS][0000:02:00.0] running init tables
[  174.004784] nouveau  [     PMC][0000:02:00.0] MSI interrupts enabled
[  174.004849] nouveau  [     PFB][0000:02:00.0] RAM type: GDDR5
[  174.004850] nouveau  [     PFB][0000:02:00.0] RAM size: 2048 MiB
[  174.004851] nouveau  [     PFB][0000:02:00.0]    ZCOMP: 0 tags
[  174.004927] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x00000002 FAULT
at 0x4188ac [ IBUS ]
[  174.006964] nouveau  [    VOLT][0000:02:00.0] GPU voltage: 600000uv
[  174.056647] nouveau  [  PTHERM][0000:02:00.0] FAN control: none / external
[  174.056662] nouveau  [  PTHERM][0000:02:00.0] fan management: automatic
[  174.056687] nouveau  [  PTHERM][0000:02:00.0] internal sensor: yes
[  174.056753] nouveau  [     CLK][0000:02:00.0] 07: core 405 MHz memory 810
MHz 
[  174.056811] nouveau  [     CLK][0000:02:00.0] 0a: core 405-1058 MHz memory
1600 MHz 
[  174.056887] nouveau  [     CLK][0000:02:00.0] 0f: core 405-1058 MHz memory
5000 MHz 
[  174.057024] nouveau  [     CLK][0000:02:00.0] --: core 405 MHz memory 810
MHz 
[  174.091539] nouveau E[    PBUS][0000:02:00.0] MMIO read of 0x00000000 FAULT
at 0x500c30 [ IBUS ]
[  174.091572] vga_switcheroo: enabled
[  174.091701] [TTM] Zone  kernel: Available graphics memory: 8169492 kiB
[  174.091702] [TTM] Zone   dma32: Available graphics memory: 2097152 kiB
[  174.091703] [TTM] Initializing pool allocator
[  174.091706] [TTM] Initializing DMA pool allocator
[  174.091713] nouveau  [     DRM] VRAM: 2048 MiB
[  174.091714] nouveau  [     DRM] GART: 1048576 MiB
[  174.091716] nouveau E[     DRM] Pointer to TMDS table invalid
[  174.091717] nouveau  [     DRM] DCB version 4.0
[  174.091718] nouveau E[     DRM] Pointer to flat panel table invalid
[  174.098167] nouveau  [     DRM] MM: using COPY for buffer copies
[  174.098177] [drm] Initialized nouveau 1.2.1 20120801 for 0000:02:00.0 on
minor 1
[  174.116049] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x00000000 FAULT
at 0x418880 [ IBUS ]
[  174.116122] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x00000000 FAULT
at 0x418e08 [ IBUS ]
[  174.116138] nouveau E[   PIBUS][0000:02:00.0] GPC0: 0x419f74 0x00000555
(0x3800820c)
[  174.116157] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x00000010 FAULT
at 0x418980 [ IBUS ]
[  174.116175] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x00000002 FAULT
at 0x4188ac [ IBUS ]
[  174.116186] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0xbadf1008 FAULT
at 0x419cc0 [ IBUS ]
[  174.116202] nouveau E[   PIBUS][0000:02:00.0] GPC0: 0x419cc0 0xbadf1008
(0x3800820c)
[  174.116235] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0xbadf1000 FAULT
at 0x419eb4 [ IBUS ]
[  174.116250] nouveau E[   PIBUS][0000:02:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[  174.116267] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x00000000 FAULT
at 0x405804 [ IBUS ]
[  174.116284] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x3f800000 FAULT
at 0x405804 [ IBUS ]
[  174.116319] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x00000000 FAULT
at 0x405804 [ IBUS ]
[  174.116345] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x3f800000 FAULT
at 0x405804 [ IBUS ]
[  174.116359] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x00000000 FAULT
at 0x405818 [ IBUS ]
[  174.116405] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x3f800000 FAULT
at 0x405818 [ IBUS ]
[  174.116422] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x00000009 FAULT
at 0x405820 [ IBUS ]
[  174.116606] nouveau E[   PIBUS][0000:02:00.0] HUB0: 0x404170 0x00000012
(0x0e008201)
[  176.118600] nouveau E[  PGRAPH][0000:02:00.0] HUB_INIT timed out
[  176.118607] nouveau E[  PGRAPH][0000:02:00.0] 409000 - done 0x00000204
[  176.118616] nouveau E[  PGRAPH][0000:02:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[  176.118626] nouveau E[  PGRAPH][0000:02:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[  176.118629] nouveau E[  PGRAPH][0000:02:00.0] 502000 - done 0x00000300
[  176.118634] nouveau E[  PGRAPH][0000:02:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[  176.118638] nouveau E[  PGRAPH][0000:02:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[  176.118640] nouveau E[  PGRAPH][0000:02:00.0] init failed, -16

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--- Comment #54 from Bozhan <bozhan at abv.bg> ---
Linux bo 4.0.0-trunk-amd64 #1 SMP Debian 4.0-1~exp1 (2015-04-21) x86_64
GNU/Linux

bo at bo:~$ dmesg | grep nouve
[   12.510157] nouveau 0000:01:00.0: enabling device (0006 -> 0007)
[   12.510320] nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x0e70d0a2
[   12.510321] nouveau  [  DEVICE][0000:01:00.0] Chipset: GK107 (NVE7)
[   12.510322] nouveau  [  DEVICE][0000:01:00.0] Family : NVE0
[   12.519025] nouveau  [   VBIOS][0000:01:00.0] using image from ACPI
[   12.519108] nouveau  [   VBIOS][0000:01:00.0] BIT signature found
[   12.519110] nouveau  [   VBIOS][0000:01:00.0] version 80.07.a8.00.0f
[   12.519398] nouveau  [ DEVINIT][0000:01:00.0] adaptor not initialised
[   12.519425] nouveau  [   VBIOS][0000:01:00.0] running init tables
[   12.675786] nouveau  [     PMC][0000:01:00.0] MSI interrupts enabled
[   12.675835] nouveau  [     PFB][0000:01:00.0] RAM type: GDDR5
[   12.675836] nouveau  [     PFB][0000:01:00.0] RAM size: 2048 MiB
[   12.675837] nouveau  [     PFB][0000:01:00.0]    ZCOMP: 0 tags
[   12.675898] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000002 FAULT
at 0x4188ac [ IBUS ]
[   12.677860] nouveau  [    VOLT][0000:01:00.0] GPU voltage: 600000uv
[   12.727255] nouveau  [  PTHERM][0000:01:00.0] FAN control: none / external
[   12.727270] nouveau  [  PTHERM][0000:01:00.0] fan management: automatic
[   12.727295] nouveau  [  PTHERM][0000:01:00.0] internal sensor: yes
[   12.727363] nouveau  [     CLK][0000:01:00.0] 07: core 405 MHz memory 810
MHz 
[   12.727421] nouveau  [     CLK][0000:01:00.0] 0a: core 405-1097 MHz memory
1600 MHz 
[   12.727496] nouveau  [     CLK][0000:01:00.0] 0f: core 405-1097 MHz memory
5400 MHz 
[   12.727633] nouveau  [     CLK][0000:01:00.0] --: core 405 MHz memory 810
MHz 
[   12.760239] nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT
at 0x500c30 [ IBUS ]
[   12.760408] nouveau  [     DRM] VRAM: 2048 MiB
[   12.760409] nouveau  [     DRM] GART: 1048576 MiB
[   12.760421] nouveau E[     DRM] Pointer to TMDS table invalid
[   12.760470] nouveau  [     DRM] DCB version 4.0
[   12.760471] nouveau E[     DRM] Pointer to flat panel table invalid
[   12.766380] nouveau  [     DRM] MM: using COPY for buffer copies
[   12.766385] [drm] Initialized nouveau 1.2.1 20120801 for 0000:01:00.0 on
minor 0
[   31.531758] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000002 FAULT
at 0x4188ac [ IBUS ]
[   32.184387] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000 FAULT
at 0x418880 [ IBUS ]
[   32.184479] nouveau E[   PIBUS][0000:01:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[   32.184553] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000 FAULT
at 0x405804 [ IBUS ]
[   32.184968] nouveau E[   PIBUS][0000:01:00.0] HUB0: 0x404170 0x00000012
(0x0e008201)
[   34.186577] nouveau E[     PGR][0000:01:00.0] HUB_INIT timed out
[   34.186588] nouveau E[     PGR][0000:01:00.0] 409000 - done 0x00000204
[   34.186600] nouveau E[     PGR][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   34.186611] nouveau E[     PGR][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[   34.186617] nouveau E[     PGR][0000:01:00.0] 502000 - done 0x00000300
[   34.186624] nouveau E[     PGR][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   34.186631] nouveau E[     PGR][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   34.186634] nouveau E[     PGR][0000:01:00.0] init failed, -16
[16430.044081] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000002 FAULT
at 0x4188ac [ IBUS ]

Is there something that users can do to help with fixing this ? :)

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Bozhan <bozhan at abv.bg> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |major

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--- Comment #55 from buhman <zack at buhman.org> ---
If anyone wants to play with bskeggs' hack:

http://cgit.freedesktop.org/~darktama/nouveau/commit/?h=hack-gk106m

He's tested W541; I've tested W540 (K2100). You'll likely need
nouveau.runpm=0
to avoid hanging. PRIME works. vdpau "works". 3D performance at pstate
0a is
something like 50% of nvidia.

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--- Comment #56 from Bozhan <bozhan at abv.bg> ---
with latest- kernel panic!
dmesg:
[    1.587345] nouveau 0000:01:00.0: enabling device (0006 -> 0007)
[    1.587568] nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x0e70d0a2
[    1.587634] nouveau  [  DEVICE][0000:01:00.0] Chipset: GK107 (NVE7)
[    1.587696] nouveau  [  DEVICE][0000:01:00.0] Family : NVE0
[    1.597449] nouveau  [   VBIOS][0000:01:00.0] using image from ACPI
[    1.597662] nouveau  [   VBIOS][0000:01:00.0] BIT signature found
[    1.597723] nouveau  [   VBIOS][0000:01:00.0] version 80.07.a8.00.0f
[    1.598055] nouveau  [ DEVINIT][0000:01:00.0] adaptor not initialised
[    1.598151] nouveau  [   VBIOS][0000:01:00.0] running init tables
[    1.754599] nouveau  [     PMC][0000:01:00.0] MSI interrupts enabled
[    1.754728] nouveau  [     PFB][0000:01:00.0] RAM type: GDDR5
[    1.754788] nouveau  [     PFB][0000:01:00.0] RAM size: 2048 MiB
[    1.754857] nouveau  [     PFB][0000:01:00.0]    ZCOMP: 0 tags
[    1.754981] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000002 FAULT
at 0x4188ac [ IBUS ]
[    1.757143] nouveau  [    VOLT][0000:01:00.0] GPU voltage: 600000uv
[    1.806650] nouveau  [  PTHERM][0000:01:00.0] FAN control: none / external
[    1.806727] nouveau  [  PTHERM][0000:01:00.0] fan management: automatic
[    1.806812] nouveau  [  PTHERM][0000:01:00.0] internal sensor: yes
[    1.806938] nouveau  [     CLK][0000:01:00.0] 07: core 405 MHz memory 810
MHz
[    1.807064] nouveau  [     CLK][0000:01:00.0] 0a: core 405-1097 MHz memory
1600 MHz
[    1.807207] nouveau  [     CLK][0000:01:00.0] 0f: core 405-1097 MHz memory
5400 MHz
[    1.807418] nouveau  [     CLK][0000:01:00.0] --: core 405 MHz memory 810
MHz
[    1.839496] nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT
at 0x500c30 [ IBUS ]
[    1.839937] nouveau  [     DRM] VRAM: 2048 MiB
[    1.839994] nouveau  [     DRM] GART: 1048576 MiB
[    1.840053] nouveau E[     DRM] Pointer to TMDS table invalid
[    1.840122] nouveau  [     DRM] DCB version 4.0
[    1.840180] nouveau E[     DRM] Pointer to flat panel table invalid
[    1.846106] nouveau  [     DRM] MM: using COPY for buffer copies
[    1.846169] [drm] Initialized nouveau 1.2.2 20120801 for 0000:01:00.0 on
minor 0
[    6.854456] nouveau E[   PFIFO][0000:01:00.0] BIND_ERROR [ UNK00 ]
[    6.855050] nouveau E[   PFIFO][0000:01:00.0] PIO_ERROR
[    6.855635] nouveau E[   PFIFO][0000:01:00.0] FB_FLUSH_TIMEOUT
[    6.856223] nouveau E[   PFIFO][0000:01:00.0] DROPPED_MMU_FAULT 0x00000000
[    6.856819] nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT
at 0x002100 [ !ENGINE ]

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--- Comment #57 from Bozhan <bozhan at abv.bg> ---
dmesg with hack-gk106m.


[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.0.0-2-amd64
root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0 quiet splash
[    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.0.0-2-amd64
root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0 quiet splash
[    1.538115] nouveau 0000:01:00.0: enabling device (0006 -> 0007)
[    1.538283] nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x0e70d0a2
[    1.538285] nouveau  [  DEVICE][0000:01:00.0] Chipset: GK107 (NVE7)
[    1.538286] nouveau  [  DEVICE][0000:01:00.0] Family : NVE0
[    1.547704] nouveau  [   VBIOS][0000:01:00.0] using image from ACPI
[    1.547791] nouveau  [   VBIOS][0000:01:00.0] BIT signature found
[    1.547793] nouveau  [   VBIOS][0000:01:00.0] version 80.07.a8.00.0f
[    1.548230] nouveau  [ DEVINIT][0000:01:00.0] adaptor not initialised
[    1.548259] nouveau  [   VBIOS][0000:01:00.0] running init tables
[    1.704732] nouveau  [     PMC][0000:01:00.0] MSI interrupts enabled
[    1.704776] nouveau  [     PFB][0000:01:00.0] RAM type: GDDR5
[    1.704777] nouveau  [     PFB][0000:01:00.0] RAM size: 2048 MiB
[    1.704778] nouveau  [     PFB][0000:01:00.0]    ZCOMP: 0 tags
[    1.704843] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000002 FAULT
at 0x4188ac [ IBUS ]
[    1.706772] nouveau  [    VOLT][0000:01:00.0] GPU voltage: 600000uv
[    1.756182] nouveau  [  PTHERM][0000:01:00.0] FAN control: none / external
[    1.756196] nouveau  [  PTHERM][0000:01:00.0] fan management: automatic
[    1.756220] nouveau  [  PTHERM][0000:01:00.0] internal sensor: yes
[    1.756286] nouveau  [     CLK][0000:01:00.0] 07: core 405 MHz memory 810
MHz 
[    1.756339] nouveau  [     CLK][0000:01:00.0] 0a: core 405-1097 MHz memory
1600 MHz 
[    1.756409] nouveau  [     CLK][0000:01:00.0] 0f: core 405-1097 MHz memory
5400 MHz 
[    1.756546] nouveau  [     CLK][0000:01:00.0] --: core 405 MHz memory 810
MHz 
[    1.788206] nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT
at 0x500c30 [ IBUS ]
[    1.788476] nouveau  [     DRM] VRAM: 2048 MiB
[    1.788477] nouveau  [     DRM] GART: 1048576 MiB
[    1.788479] nouveau E[     DRM] Pointer to TMDS table invalid
[    1.788526] nouveau  [     DRM] DCB version 4.0
[    1.788527] nouveau E[     DRM] Pointer to flat panel table invalid
[    1.794450] nouveau  [     DRM] MM: using COPY for buffer copies
[    1.794453] [drm] Initialized nouveau 1.2.2 20120801 for 0000:01:00.0 on
minor 0
[   44.819011] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000 FAULT
at 0x418880 [ IBUS ]
[   44.819097] nouveau E[   PIBUS][0000:01:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[   44.819132] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000 FAULT
at 0x405804 [ IBUS ]
[   44.819333] nouveau E[   PIBUS][0000:01:00.0] HUB0: 0x404170 0x00000012
(0x0e008201)
[   46.820946] nouveau E[  PGRAPH][0000:01:00.0] HUB_INIT timed out
[   46.820953] nouveau E[  PGRAPH][0000:01:00.0] 409000 - done 0x00000204
[   46.820963] nouveau E[  PGRAPH][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   46.820972] nouveau E[  PGRAPH][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[   46.820975] nouveau E[  PGRAPH][0000:01:00.0] 502000 - done 0x00000300
[   46.820980] nouveau E[  PGRAPH][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   46.820984] nouveau E[  PGRAPH][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   46.820986] nouveau E[  PGRAPH][0000:01:00.0] init failed, -16

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--- Comment #58 from Ben Skeggs <skeggsb at gmail.com> ---
(In reply to Bozhan from comment #57)
> dmesg with hack-gk106m.
The code won't help you, it's only executed for GK104/6. The symptoms,
however,
look very much the same as those chipsets before we had PGOB disable support
for them. NVIDIA told us it's not needed on GK107.  Do you have an mmiotrace
of
the NVIDIA binary driver on your board? 
> 
> 
> [    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.0.0-2-amd64
> root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0 quiet
> splash
> [    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.0.0-2-amd64
> root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0 quiet
> splash
> [    1.538115] nouveau 0000:01:00.0: enabling device (0006 -> 0007)
> [    1.538283] nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x0e70d0a2
> [    1.538285] nouveau  [  DEVICE][0000:01:00.0] Chipset: GK107 (NVE7)
> [    1.538286] nouveau  [  DEVICE][0000:01:00.0] Family : NVE0
> [    1.547704] nouveau  [   VBIOS][0000:01:00.0] using image from ACPI
> [    1.547791] nouveau  [   VBIOS][0000:01:00.0] BIT signature found
> [    1.547793] nouveau  [   VBIOS][0000:01:00.0] version 80.07.a8.00.0f
> [    1.548230] nouveau  [ DEVINIT][0000:01:00.0] adaptor not initialised
> [    1.548259] nouveau  [   VBIOS][0000:01:00.0] running init tables
> [    1.704732] nouveau  [     PMC][0000:01:00.0] MSI interrupts enabled
> [    1.704776] nouveau  [     PFB][0000:01:00.0] RAM type: GDDR5
> [    1.704777] nouveau  [     PFB][0000:01:00.0] RAM size: 2048 MiB
> [    1.704778] nouveau  [     PFB][0000:01:00.0]    ZCOMP: 0 tags
> [    1.704843] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000002
> FAULT at 0x4188ac [ IBUS ]
> [    1.706772] nouveau  [    VOLT][0000:01:00.0] GPU voltage: 600000uv
> [    1.756182] nouveau  [  PTHERM][0000:01:00.0] FAN control: none /
external
> [    1.756196] nouveau  [  PTHERM][0000:01:00.0] fan management: automatic
> [    1.756220] nouveau  [  PTHERM][0000:01:00.0] internal sensor: yes
> [    1.756286] nouveau  [     CLK][0000:01:00.0] 07: core 405 MHz memory
810
> MHz 
> [    1.756339] nouveau  [     CLK][0000:01:00.0] 0a: core 405-1097 MHz
> memory 1600 MHz 
> [    1.756409] nouveau  [     CLK][0000:01:00.0] 0f: core 405-1097 MHz
> memory 5400 MHz 
> [    1.756546] nouveau  [     CLK][0000:01:00.0] --: core 405 MHz memory
810
> MHz 
> [    1.788206] nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000
> FAULT at 0x500c30 [ IBUS ]
> [    1.788476] nouveau  [     DRM] VRAM: 2048 MiB
> [    1.788477] nouveau  [     DRM] GART: 1048576 MiB
> [    1.788479] nouveau E[     DRM] Pointer to TMDS table invalid
> [    1.788526] nouveau  [     DRM] DCB version 4.0
> [    1.788527] nouveau E[     DRM] Pointer to flat panel table invalid
> [    1.794450] nouveau  [     DRM] MM: using COPY for buffer copies
> [    1.794453] [drm] Initialized nouveau 1.2.2 20120801 for 0000:01:00.0 on
> minor 0
> [   44.819011] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000
> FAULT at 0x418880 [ IBUS ]
> [   44.819097] nouveau E[   PIBUS][0000:01:00.0] GPC0: 0x419eb4 0xbadf1000
> (0x3800820c)
> [   44.819132] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000
> FAULT at 0x405804 [ IBUS ]
> [   44.819333] nouveau E[   PIBUS][0000:01:00.0] HUB0: 0x404170 0x00000012
> (0x0e008201)
> [   46.820946] nouveau E[  PGRAPH][0000:01:00.0] HUB_INIT timed out
> [   46.820953] nouveau E[  PGRAPH][0000:01:00.0] 409000 - done 0x00000204
> [   46.820963] nouveau E[  PGRAPH][0000:01:00.0] 409000 - stat 0x00000000
> 0x00000000 0x00000000 0x00000000
> [   46.820972] nouveau E[  PGRAPH][0000:01:00.0] 409000 - stat 0x00000000
> 0x00000000 0x00000002 0x00000009
> [   46.820975] nouveau E[  PGRAPH][0000:01:00.0] 502000 - done 0x00000300
> [   46.820980] nouveau E[  PGRAPH][0000:01:00.0] 502000 - stat 0x00000000
> 0x00000000 0x00000000 0x00000000
> [   46.820984] nouveau E[  PGRAPH][0000:01:00.0] 502000 - stat 0x00000000
> 0x00000000 0x00000000 0x00000000
> [   46.820986] nouveau E[  PGRAPH][0000:01:00.0] init failed, -16
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--- Comment #59 from Bozhan <bozhan at abv.bg> ---
Created attachment 116849
  --> https://bugs.freedesktop.org/attachment.cgi?id=116849&action=edit
mmiotrace for GK107

is it enough?

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--- Comment #60 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Bozhan from comment #59)
> Created attachment 116849 [details]
> mmiotrace for GK107
> 
> is it enough?
No. The trace should be 20-50 MB (make sure to xz -9 it). You need to run e.g.
'nvidia-smi' once the nvidia module is loaded. Or start X, but
that's heavier
and probably unnecessary.

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--- Comment #61 from Bozhan <bozhan at abv.bg> ---
Created attachment 116853
  --> https://bugs.freedesktop.org/attachment.cgi?id=116853&action=edit
mmiotrace for GK107 ~39MB

mmiotrace for GK107

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--- Comment #62 from Ben Skeggs <skeggsb at gmail.com> ---
(In reply to Bozhan Boyadzhiev from comment #61)
> Created attachment 116853 [details]
> mmiotrace for GK107 ~39MB
> 
> mmiotrace for GK107
Heh, so much for GK107 not having PGOB... I'll ping NVIDIA on this one and
get
back to you.  If I get time in the next few days, I'll hack you up a patch.

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--- Comment #63 from Bozhan Boyadzhiev <bozhan at abv.bg> ---
(In reply to Ben Skeggs from comment #62)
> (In reply to Bozhan Boyadzhiev from comment #61)
> > Created attachment 116853 [details]
> > mmiotrace for GK107 ~39MB
> > 
> > mmiotrace for GK107
> 
> Heh, so much for GK107 not having PGOB... I'll ping NVIDIA on this one
and
> get back to you.  If I get time in the next few days, I'll hack you up
a
> patch.
i've erased the first letter on my keyboard with which begins the domain of
my
webmail to check if i have message from this bug :)))

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--- Comment #64 from Ben Skeggs <skeggsb at gmail.com> ---
(In reply to Bozhan Boyadzhiev from comment #63)
> (In reply to Ben Skeggs from comment #62)
> > (In reply to Bozhan Boyadzhiev from comment #61)
> > > Created attachment 116853 [details]
> > > mmiotrace for GK107 ~39MB
> > > 
> > > mmiotrace for GK107
> > 
> > Heh, so much for GK107 not having PGOB... I'll ping NVIDIA on this
one and
> > get back to you.  If I get time in the next few days, I'll hack
you up a
> > patch.
> 
> i've erased the first letter on my keyboard with which begins the
domain of
> my webmail to check if i have message from this bug :)))
My nouveau tree[1] has a couple of patches that will *hopefully* fix the issues
you're seeing.

[1] http://cgit.freedesktop.org/~darktama/nouveau/log/

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--- Comment #65 from Bozhan Boyadzhiev <bozhan at abv.bg> ---
Sorry for delay.


[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.3.0-rc4-amd64
root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0 quiet splash
[    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.3.0-rc4-amd64
root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0 quiet splash
[   17.692733] nouveau 0000:01:00.0: enabling device (0006 -> 0007)
[   17.692756] nouveau 0000:01:00.0: NVIDIA GK107 (0e70d0a2)
[   17.705157] nouveau 0000:01:00.0: bios: version 80.07.a8.00.0f
[   17.867615] nouveau 0000:01:00.0: fb: 2048 MiB GDDR5
[   17.867692] nouveau 0000:01:00.0: bus: MMIO write of 00000002 FAULT at
4188ac [ IBUS ]
[   17.938396] nouveau 0000:01:00.0: DRM: VRAM: 2048 MiB
[   17.938397] nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
[   17.938399] nouveau 0000:01:00.0: DRM: Pointer to TMDS table invalid
[   17.938417] nouveau 0000:01:00.0: DRM: DCB version 4.0
[   17.938418] nouveau 0000:01:00.0: DRM: Pointer to flat panel table invalid
[   18.168394] nouveau 0000:01:00.0: DRM: MM: using COPY for buffer copies
[   18.168400] [drm] Initialized nouveau 1.3.0 20120801 for 0000:01:00.0 on
minor 1
[   25.809299] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw:
0, busy: 1)
[   27.810911] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw:
0, busy: 1)
[   29.812527] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw:
0, busy: 1)
[   31.814138] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw:
0, busy: 1)
[   33.815894] nouveau 0000:01:00.0: timeout at
/home/bozhan/nouveau/drm/nouveau/nvkm/engine/gr/ctxgf100.c:1365/gf100_grctx_generate()!
[   33.815947] nouveau 0000:01:00.0: gr: failed to construct context
[   33.815951] nouveau 0000:01:00.0: gr: init failed, -16


This is with your tree.

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--- Comment #66 from Julien Isorce <julien.isorce at gmail.com> ---
Hi, I have a laptop with 2 graphics cards, one intel and one GeForce GT 750 M.
My gnome desktop use the former by default. And when trying to use nouveau I
got the same problem exposed in this bug.
Actually I am interesting in using the nouveau driver for HW decoding.

With the nouveau branch in darktama repo I could have it working with headless
display (using DRM). Though it looks not stable in the sense it sometimes works
after loading the kernel module nouveau.ko freshly built. And sometimes not.
And it seems not robust to init/deinit several times.
But better than nothing so it is still great !

I have noticed this error in kern.log:
t 19 00:05:02 nb-716 kernel: [  737.034566] nouveau 0000:01:00.0: DRM: resuming
kernel object tree...
Oct 19 00:05:02 nb-716 kernel: [  737.111653] nouveau 0000:01:00.0: bus: MMIO
read of 00000000 FAULT at 085048 [ IBUS ]
Oct 19 00:05:03 nb-716 kernel: [  737.177696] nouveau 0000:01:00.0: DRM:
resuming client object trees...
Oct 19 00:05:05 nb-716 kernel: [  739.336600] nouveau 0000:01:00.0: timeout at
/home/julien/gst/master/nouveau/drm/nouveau/nvkm/engine/gr/gf100.c:1479/gf100_gr_init_ctxctl()!
Oct 19 00:05:05 nb-716 kernel: [  739.336608] nouveau 0000:01:00.0: gr: 409000
- done 00000220
Oct 19 00:05:05 nb-716 kernel: [  739.336619] nouveau 0000:01:00.0: gr: 409000
- stat 00000000 00000000 00000000 00000000
Oct 19 00:05:05 nb-716 kernel: [  739.336629] nouveau 0000:01:00.0: gr: 409000
- stat 00000000 00000000 00000006 00000001
Oct 19 00:05:05 nb-716 kernel: [  739.336633] nouveau 0000:01:00.0: gr: 502000
- done 00000300
Oct 19 00:05:05 nb-716 kernel: [  739.336638] nouveau 0000:01:00.0: gr: 502000
- stat 00000000 00008c00 00000000 00000000
Oct 19 00:05:05 nb-716 kernel: [  739.336643] nouveau 0000:01:00.0: gr: 502000
- stat 00000000 00000000 00000000 00000000
Oct 19 00:05:05 nb-716 kernel: [  739.336645] nouveau 0000:01:00.0: gr: init
failed, -16
Oct 19 00:05:07 nb-716 kernel: [  741.514997] nouveau 0000:01:00.0: timeout at
/home/julien/gst/master/nouveau/drm/nouveau/nvkm/engine/gr/gf100.c:1479/gf100_gr_init_ctxctl()!

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--- Comment #67 from Ben Skeggs <skeggsb at gmail.com> ---
(In reply to Bozhan Boyadzhiev from comment #65)
> Sorry for delay.
> 
> 
> [    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.3.0-rc4-amd64
> root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0 quiet
> splash
> [    0.000000] Kernel command line:
BOOT_IMAGE=/boot/vmlinuz-4.3.0-rc4-amd64
> root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0 quiet
> splash
> [   17.692733] nouveau 0000:01:00.0: enabling device (0006 -> 0007)
> [   17.692756] nouveau 0000:01:00.0: NVIDIA GK107 (0e70d0a2)
> [   17.705157] nouveau 0000:01:00.0: bios: version 80.07.a8.00.0f
> [   17.867615] nouveau 0000:01:00.0: fb: 2048 MiB GDDR5
> [   17.867692] nouveau 0000:01:00.0: bus: MMIO write of 00000002 FAULT at
> 4188ac [ IBUS ]
> [   17.938396] nouveau 0000:01:00.0: DRM: VRAM: 2048 MiB
> [   17.938397] nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
> [   17.938399] nouveau 0000:01:00.0: DRM: Pointer to TMDS table invalid
> [   17.938417] nouveau 0000:01:00.0: DRM: DCB version 4.0
> [   17.938418] nouveau 0000:01:00.0: DRM: Pointer to flat panel table
invalid
> [   18.168394] nouveau 0000:01:00.0: DRM: MM: using COPY for buffer copies
> [   18.168400] [drm] Initialized nouveau 1.3.0 20120801 for 0000:01:00.0 on
> minor 1
> [   25.809299] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1,
> ctxsw: 0, busy: 1)
> [   27.810911] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1,
> ctxsw: 0, busy: 1)
> [   29.812527] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1,
> ctxsw: 0, busy: 1)
> [   31.814138] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1,
> ctxsw: 0, busy: 1)
> [   33.815894] nouveau 0000:01:00.0: timeout at
> /home/bozhan/nouveau/drm/nouveau/nvkm/engine/gr/ctxgf100.c:1365/
> gf100_grctx_generate()!
> [   33.815947] nouveau 0000:01:00.0: gr: failed to construct context
> [   33.815951] nouveau 0000:01:00.0: gr: init failed, -16
> 
> 
> This is with your tree.
If you add "nouveau.config=War00C800_0=1" to your kernel options, does
that
help?

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--- Comment #68 from Julien Isorce <julien.isorce at gmail.com> ---
(In reply to Ben Skeggs from comment #67)
> If you add "nouveau.config=War00C800_0=1" to your kernel options,
does that
> help?
Sorry I am replying to this question too even if not addressed to me. For me it
does not help. At least I do not see the difference. It is actually hard to
have the driver working, I have to unload/load several time, 

nouveau 0000:01:00.0: bus: MMIO read of 00000000 FAULT at 085048 [ IBUS ]

I am happy to provide as many logs as you need, just let me know precisely how
to generate them.

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--- Comment #69 from Bozhan Boyadzhiev <bozhan at abv.bg> ---
^C
bozhan at bozhan:~$ dmesg | grep nouveau
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.3.0-rc5-amd64
root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0
nouveau.config=War00C800_0=1 quiet splash
[    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.3.0-rc5-amd64
root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0
nouveau.config=War00C800_0=1 quiet splash
[    8.800478] nouveau 0000:01:00.0: enabling device (0006 -> 0007)
[    8.800502] nouveau 0000:01:00.0: NVIDIA GK107 (0e70d0a2)
[    8.816187] nouveau 0000:01:00.0: bios: version 80.07.a8.00.0f
[    8.978677] nouveau 0000:01:00.0: fb: 2048 MiB GDDR5
[    8.978754] nouveau 0000:01:00.0: bus: MMIO write of 00000002 FAULT at
4188ac [ IBUS ]
[    9.050234] nouveau 0000:01:00.0: DRM: VRAM: 2048 MiB
[    9.050235] nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
[    9.050238] nouveau 0000:01:00.0: DRM: Pointer to TMDS table invalid
[    9.050258] nouveau 0000:01:00.0: DRM: DCB version 4.0
[    9.050259] nouveau 0000:01:00.0: DRM: Pointer to flat panel table invalid
[    9.242859] nouveau 0000:01:00.0: DRM: MM: using COPY for buffer copies
[    9.242861] [drm] Initialized nouveau 1.3.0 20120801 for 0000:01:00.0 on
minor 1
[   16.711127] nouveau 0000:01:00.0: pmu: hw bug workaround enabled
[   16.823251] nouveau 0000:01:00.0: pmu: hw bug workaround enabled

nice :)


bozhan at bozhan:~$ DRI_PRIME=1 glxgears -info
Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.
GL_RENDERER   = Gallium 0.4 on NVE7
GL_VERSION    = 3.0 Mesa 10.6.8
GL_VENDOR     = nouveau

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--- Comment #70 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Bozhan Boyadzhiev from comment #69)
> ^C
> bozhan at bozhan:~$ dmesg | grep nouveau
> [    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.3.0-rc5-amd64
> root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0
> nouveau.config=War00C800_0=1 quiet splash
> [    0.000000] Kernel command line:
BOOT_IMAGE=/boot/vmlinuz-4.3.0-rc5-amd64
> root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0
> nouveau.config=War00C800_0=1 quiet splash
> [    8.800478] nouveau 0000:01:00.0: enabling device (0006 -> 0007)
> [    8.800502] nouveau 0000:01:00.0: NVIDIA GK107 (0e70d0a2)
> [    8.816187] nouveau 0000:01:00.0: bios: version 80.07.a8.00.0f
> [    8.978677] nouveau 0000:01:00.0: fb: 2048 MiB GDDR5
> [    8.978754] nouveau 0000:01:00.0: bus: MMIO write of 00000002 FAULT at
> 4188ac [ IBUS ]
> [    9.050234] nouveau 0000:01:00.0: DRM: VRAM: 2048 MiB
> [    9.050235] nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
> [    9.050238] nouveau 0000:01:00.0: DRM: Pointer to TMDS table invalid
> [    9.050258] nouveau 0000:01:00.0: DRM: DCB version 4.0
> [    9.050259] nouveau 0000:01:00.0: DRM: Pointer to flat panel table
invalid
> [    9.242859] nouveau 0000:01:00.0: DRM: MM: using COPY for buffer copies
> [    9.242861] [drm] Initialized nouveau 1.3.0 20120801 for 0000:01:00.0 on
> minor 1
> [   16.711127] nouveau 0000:01:00.0: pmu: hw bug workaround enabled
> [   16.823251] nouveau 0000:01:00.0: pmu: hw bug workaround enabled
> 
> nice :)
> 
> 
> bozhan at bozhan:~$ DRI_PRIME=1 glxgears -info
> Running synchronized to the vertical refresh.  The framerate should be
> approximately the same as the monitor refresh rate.
> GL_RENDERER   = Gallium 0.4 on NVE7
> GL_VERSION    = 3.0 Mesa 10.6.8
> GL_VENDOR     = nouveau
Please provide the output of 'lspci -nnv -d 10de::300' so that we can
add it to
the workaround list by default.

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https://bugs.freedesktop.org/show_bug.cgi?id=70354

--- Comment #71 from Richard <rich at warfaresdl.com> ---
Aww... got my hopes up :( No dice with 'nouveau.config=War00C800_0=1' on
this
setup:

[    1.865840] fb: switching to nouveaufb from simple
[    1.866421] nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x0e70d0a2
[    1.866423] nouveau  [  DEVICE][0000:01:00.0] Chipset: GK107 (NVE7)
[    1.866425] nouveau  [  DEVICE][0000:01:00.0] Family : NVE0
[    1.884543] nouveau  [   VBIOS][0000:01:00.0] using image from ACPI
[    1.884658] nouveau  [   VBIOS][0000:01:00.0] BIT signature found
[    1.884660] nouveau  [   VBIOS][0000:01:00.0] version 80.07.a8.00.2e
[    1.885073] nouveau  [     PFB][0000:01:00.0] RAM type: GDDR5
[    1.885074] nouveau  [     PFB][0000:01:00.0] RAM size: 2048 MiB
[    1.885075] nouveau  [     PFB][0000:01:00.0]    ZCOMP: 0 tags
[    1.887346] nouveau  [    VOLT][0000:01:00.0] GPU voltage: 600000uv
[    1.940034] nouveau  [  PTHERM][0000:01:00.0] FAN control: none / external
[    1.940058] nouveau  [  PTHERM][0000:01:00.0] fan management: automatic
[    1.940083] nouveau  [  PTHERM][0000:01:00.0] internal sensor: yes
[    1.940152] nouveau  [     CLK][0000:01:00.0] 07: core 405 MHz memory 810
MHz 
[    1.940201] nouveau  [     CLK][0000:01:00.0] 0a: core 405-1097 MHz memory
1600 MHz 
[    1.940285] nouveau  [     CLK][0000:01:00.0] 0f: core 405-1097 MHz memory
5400 MHz 
[    1.940486] nouveau  [     CLK][0000:01:00.0] --: core 405 MHz memory 810
MHz 
[    1.974897] nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT
at 0x10a028 [ IBUS ]
[    1.975102] nouveau  [     DRM] VRAM: 2048 MiB
[    1.975103] nouveau  [     DRM] GART: 1048576 MiB
[    1.975106] nouveau  [     DRM] TMDS table version 2.0
[    1.975107] nouveau  [     DRM] DCB version 4.0
[    1.975109] nouveau  [     DRM] DCB outp 00: 04000fb6 0f420010
[    1.975110] nouveau  [     DRM] DCB outp 01: 08011f82 00020010
[    1.975111] nouveau  [     DRM] DCB outp 02: 02044f00 00000000
[    1.975113] nouveau  [     DRM] DCB conn 00: 00020047
[    1.975114] nouveau  [     DRM] DCB conn 01: 01000161
[    1.975115] nouveau  [     DRM] DCB conn 04: 00000400
[    1.989343] nouveau  [     DRM] MM: using COPY for buffer copies
[    2.085542] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000 FAULT
at 0x418880 [ IBUS ]
[    2.085640] nouveau E[   PIBUS][0000:01:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[    2.085702] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x3f800000 FAULT
at 0x405804 [ IBUS ]
[    2.085850] nouveau E[   PIBUS][0000:01:00.0] HUB0: 0x404170 0x00000012
(0x0e008201)
[    4.087453] nouveau E[     PGR][0000:01:00.0] HUB_INIT timed out
[    4.087481] nouveau E[     PGR][0000:01:00.0] 409000 - done 0x00000204
[    4.087507] nouveau E[     PGR][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[    4.087534] nouveau E[     PGR][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[    4.087555] nouveau E[     PGR][0000:01:00.0] 502000 - done 0x00000300
[    4.087569] nouveau E[     PGR][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[    4.087596] nouveau E[     PGR][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[    4.087614] nouveau E[     PGR][0000:01:00.0] init failed, -16
[    4.093274] nouveau  [     DRM] allocated 1920x1080 fb: 0x60000, bo
ffff880262102400
[    4.093465] fbcon: nouveaufb (fb0) is primary device
[    4.607106] nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device
[    4.607108] nouveau 0000:01:00.0: registered panic notifier
[    4.613443] [drm] Initialized nouveau 1.2.1 20120801 for 0000:01:00.0 on
minor 0
[    4.613483] nouveau 0000:07:00.0: enabling device (0006 -> 0007)
[    4.613656] nouveau  [  DEVICE][0000:07:00.0] BOOT0  : 0x0e70d0a2
[    4.613658] nouveau  [  DEVICE][0000:07:00.0] Chipset: GK107 (NVE7)
[    4.613659] nouveau  [  DEVICE][0000:07:00.0] Family : NVE0
[    4.682395] nouveau  [   VBIOS][0000:07:00.0] using image from PROM
[    4.683132] nouveau  [   VBIOS][0000:07:00.0] BIT signature found
[    4.683134] nouveau  [   VBIOS][0000:07:00.0] version 80.07.a8.00.32
[    4.683281] nouveau  [ DEVINIT][0000:07:00.0] adaptor not initialised
[    4.683309] nouveau  [   VBIOS][0000:07:00.0] running init tables
[    5.001537] nouveau  [     PFB][0000:07:00.0] RAM type: GDDR5
[    5.001538] nouveau  [     PFB][0000:07:00.0] RAM size: 2048 MiB
[    5.001539] nouveau  [     PFB][0000:07:00.0]    ZCOMP: 0 tags
[    5.003594] nouveau  [    VOLT][0000:07:00.0] GPU voltage: 600000uv
[    5.055514] nouveau  [  PTHERM][0000:07:00.0] FAN control: none / external
[    5.055528] nouveau  [  PTHERM][0000:07:00.0] fan management: automatic
[    5.055553] nouveau  [  PTHERM][0000:07:00.0] internal sensor: yes
[    5.055620] nouveau  [     CLK][0000:07:00.0] 07: core 405 MHz memory 810
MHz 
[    5.055669] nouveau  [     CLK][0000:07:00.0] 0a: core 405-1097 MHz memory
1600 MHz 
[    5.055734] nouveau  [     CLK][0000:07:00.0] 0f: core 405-1097 MHz memory
5400 MHz 
[    5.055909] nouveau  [     CLK][0000:07:00.0] --: core 405 MHz memory 810
MHz 
[    5.097252] nouveau E[    PBUS][0000:07:00.0] MMIO write of 0x00000002 FAULT
at 0x4188ac [ IBUS ]
[    5.097361] nouveau  [     DRM] VRAM: 2048 MiB
[    5.097363] nouveau  [     DRM] GART: 1048576 MiB
[    5.097365] nouveau  [     DRM] TMDS table version 2.0
[    5.097367] nouveau  [     DRM] DCB version 4.0
[    5.097368] nouveau  [     DRM] DCB outp 01: 08011f82 00020010
[    5.097369] nouveau  [     DRM] DCB outp 02: 02044f00 00000000
[    5.097371] nouveau  [     DRM] DCB conn 01: 01000161
[    5.097372] nouveau  [     DRM] DCB conn 04: 00000400
[    5.105736] nouveau  [     DRM] MM: using COPY for buffer copies
[    5.105741] [drm] Initialized nouveau 1.2.1 20120801 for 0000:07:00.0 on
minor 1
[   42.778669] nouveau E[    PBUS][0000:07:00.0] MMIO write of 0x00000000 FAULT
at 0x418880 [ IBUS ]
[   42.778766] nouveau E[   PIBUS][0000:07:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[   42.778844] nouveau E[    PBUS][0000:07:00.0] MMIO write of 0x3f800000 FAULT
at 0x405804 [ IBUS ]
[   42.778964] nouveau E[   PIBUS][0000:07:00.0] HUB0: 0x404170 0x00000012
(0x0e008201)
[   44.780562] nouveau E[     PGR][0000:07:00.0] HUB_INIT timed out
[   44.780569] nouveau E[     PGR][0000:07:00.0] 409000 - done 0x00000204
[   44.780579] nouveau E[     PGR][0000:07:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   44.780588] nouveau E[     PGR][0000:07:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[   44.780591] nouveau E[     PGR][0000:07:00.0] 502000 - done 0x00000300
[   44.780596] nouveau E[     PGR][0000:07:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   44.780600] nouveau E[     PGR][0000:07:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   44.780602] nouveau E[     PGR][0000:07:00.0] init failed, -16
[   44.782794] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000 FAULT
at 0x418880 [ IBUS ]
[   44.782852] nouveau E[   PIBUS][0000:01:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[   44.783022] nouveau E[   PIBUS][0000:01:00.0] HUB0: 0x404170 0x00000012
(0x0e008201)
[   46.784624] nouveau E[     PGR][0000:01:00.0] HUB_INIT timed out
[   46.784647] nouveau E[     PGR][0000:01:00.0] 409000 - done 0x00000204
[   46.784662] nouveau E[     PGR][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   46.784676] nouveau E[     PGR][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[   46.784682] nouveau E[     PGR][0000:01:00.0] 502000 - done 0x00000300
[   46.784691] nouveau E[     PGR][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   46.784700] nouveau E[     PGR][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   46.784704] nouveau E[     PGR][0000:01:00.0] init failed, -16
[   56.833919] nouveau E[    PBUS][0000:07:00.0] MMIO write of 0x00000000 FAULT
at 0x418880 [ IBUS ]
[   56.833963] nouveau E[   PIBUS][0000:07:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[   56.834146] nouveau E[   PIBUS][0000:07:00.0] HUB0: 0x404170 0x00000012
(0x0e008201)
[   58.835745] nouveau E[     PGR][0000:07:00.0] HUB_INIT timed out
[   58.835752] nouveau E[     PGR][0000:07:00.0] 409000 - done 0x00000204
[   58.835761] nouveau E[     PGR][0000:07:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   58.835770] nouveau E[     PGR][0000:07:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[   58.835774] nouveau E[     PGR][0000:07:00.0] 502000 - done 0x00000300
[   58.835778] nouveau E[     PGR][0000:07:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   58.835783] nouveau E[     PGR][0000:07:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   58.835784] nouveau E[     PGR][0000:07:00.0] init failed, -16
[   58.837853] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000 FAULT
at 0x418880 [ IBUS ]
[   58.837908] nouveau E[   PIBUS][0000:01:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[   58.838074] nouveau E[   PIBUS][0000:01:00.0] HUB0: 0x404170 0x00000012
(0x0e008201)
[   60.839673] nouveau E[     PGR][0000:01:00.0] HUB_INIT timed out
[   60.839693] nouveau E[     PGR][0000:01:00.0] 409000 - done 0x00000204
[   60.839708] nouveau E[     PGR][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   60.839721] nouveau E[     PGR][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[   60.839728] nouveau E[     PGR][0000:01:00.0] 502000 - done 0x00000300
[   60.839737] nouveau E[     PGR][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   60.839746] nouveau E[     PGR][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   60.839750] nouveau E[     PGR][0000:01:00.0] init failed, -16
[   68.053027] nouveau E[    PBUS][0000:07:00.0] MMIO write of 0x00000000 FAULT
at 0x418880 [ IBUS ]
[   68.053069] nouveau E[   PIBUS][0000:07:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[   68.053237] nouveau E[   PIBUS][0000:07:00.0] HUB0: 0x404170 0x00000012
(0x0e008201)
[   70.054844] nouveau E[     PGR][0000:07:00.0] HUB_INIT timed out
[   70.054850] nouveau E[     PGR][0000:07:00.0] 409000 - done 0x00000204
[   70.054860] nouveau E[     PGR][0000:07:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   70.054869] nouveau E[     PGR][0000:07:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[   70.054872] nouveau E[     PGR][0000:07:00.0] 502000 - done 0x00000300
[   70.054876] nouveau E[     PGR][0000:07:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   70.054881] nouveau E[     PGR][0000:07:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   70.054882] nouveau E[     PGR][0000:07:00.0] init failed, -16
[   70.056973] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00000000 FAULT
at 0x418880 [ IBUS ]
[   70.057022] nouveau E[   PIBUS][0000:01:00.0] GPC0: 0x419eb4 0xbadf1000
(0x3800820c)
[   70.057186] nouveau E[   PIBUS][0000:01:00.0] HUB0: 0x404170 0x00000012
(0x0e008201)
[   72.058785] nouveau E[     PGR][0000:01:00.0] HUB_INIT timed out
[   72.058806] nouveau E[     PGR][0000:01:00.0] 409000 - done 0x00000204
[   72.058821] nouveau E[     PGR][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   72.058834] nouveau E[     PGR][0000:01:00.0] 409000 - stat 0x00000000
0x00000000 0x00000002 0x00000009
[   72.058841] nouveau E[     PGR][0000:01:00.0] 502000 - done 0x00000300
[   72.058850] nouveau E[     PGR][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   72.058858] nouveau E[     PGR][0000:01:00.0] 502000 - stat 0x00000000
0x00000000 0x00000000 0x00000000
[   72.058863] nouveau E[     PGR][0000:01:00.0] init failed, -16

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--- Comment #72 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Richard from comment #71)
> Aww... got my hopes up :( No dice with
'nouveau.config=War00C800_0=1' on
> this setup:
> 
> [    1.865840] fb: switching to nouveaufb from simple
> [    1.866421] nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x0e70d0a2
You need a kernel that supports this workaround... 4.3-rcN should do.

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--- Comment #73 from Julien Isorce <julien.isorce at gmail.com> ---
Hi, I created file: /etc/modprobe.d/nouveau-kms.conf and added line: 
options nouveau War00C800_0=1
in there. Is it correct way to do it ? Thx

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--- Comment #74 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Julien Isorce from comment #73)
> Hi, I created file: /etc/modprobe.d/nouveau-kms.conf and added line: 
> options nouveau War00C800_0=1
> in there. Is it correct way to do it ? Thx
Nope. you want:

options nouveau config=War00C800_0=1

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--- Comment #75 from Bozhan Boyadzhiev <bozhan at abv.bg> ---
(In reply to Ilia Mirkin from comment #70)
> (In reply to Bozhan Boyadzhiev from comment #69)
> Please provide the output of 'lspci -nnv -d 10de::300' so that we
can add it
> to the workaround list by default.


bozhan at bozhan:~$ sudo lspci -nnv -d 10de::300
[sudo] password for bozhan: 
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107M [GeForce GT
755M] [10de:0fcd] (rev a1) (prog-if 00 [VGA controller])
        Subsystem: Lenovo Device [17aa:3801]
        Flags: bus master, fast devsel, latency 0, IRQ 33
        Memory at c0000000 (32-bit, non-prefetchable) [size=16M]
        Memory at 90000000 (64-bit, prefetchable) [size=256M]
        Memory at a0000000 (64-bit, prefetchable) [size=32M]
        I/O ports at 4000 [size=128]
        Expansion ROM at c1000000 [disabled] [size=512K]
        Capabilities: [60] Power Management version 3
        Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [78] Express Endpoint, MSI 00
        Capabilities: [b4] Vendor Specific Information: Len=14 <?>
        Capabilities: [100] Virtual Channel
        Capabilities: [128] Power Budgeting <?>
        Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024
<?>
        Capabilities: [900] #19
        Kernel driver in use: nouveau

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--- Comment #76 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Bozhan Boyadzhiev from comment #75)
> (In reply to Ilia Mirkin from comment #70)
> > (In reply to Bozhan Boyadzhiev from comment #69)
> 
> > Please provide the output of 'lspci -nnv -d 10de::300' so that
we can add it
> > to the workaround list by default.
> 
> 
> 
> bozhan at bozhan:~$ sudo lspci -nnv -d 10de::300
> [sudo] password for bozhan: 
> 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107M
[GeForce
> GT 755M] [10de:0fcd] (rev a1) (prog-if 00 [VGA controller])
>         Subsystem: Lenovo Device [17aa:3801]
>         Flags: bus master, fast devsel, latency 0, IRQ 33
>         Memory at c0000000 (32-bit, non-prefetchable) [size=16M]
>         Memory at 90000000 (64-bit, prefetchable) [size=256M]
>         Memory at a0000000 (64-bit, prefetchable) [size=32M]
>         I/O ports at 4000 [size=128]
>         Expansion ROM at c1000000 [disabled] [size=512K]
>         Capabilities: [60] Power Management version 3
>         Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
>         Capabilities: [78] Express Endpoint, MSI 00
>         Capabilities: [b4] Vendor Specific Information: Len=14 <?>
>         Capabilities: [100] Virtual Channel
>         Capabilities: [128] Power Budgeting <?>
>         Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1
> Len=024 <?>
>         Capabilities: [900] #19
>         Kernel driver in use: nouveau
Weird, someone with a fairly identical GPU and nouveau comes up fine for them:
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1327624

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--- Comment #77 from Bozhan Boyadzhiev <bozhan at abv.bg> ---
(In reply to Ilia Mirkin from comment #76)
> 
> Weird, someone with a fairly identical GPU and nouveau comes up fine for
> them: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1327624
dmesg without workaround:

bozhan at bozhan:~$ dmesg | grep nouveau
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.3.0-rc5-amd64
root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0 quiet splash
[    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.3.0-rc5-amd64
root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0 quiet splash
[    6.429245] nouveau 0000:01:00.0: enabling device (0006 -> 0007)
[    6.429268] nouveau 0000:01:00.0: NVIDIA GK107 (0e70d0a2)
[    6.443237] nouveau 0000:01:00.0: bios: version 80.07.a8.00.0f
[    6.605738] nouveau 0000:01:00.0: fb: 2048 MiB GDDR5
[    6.605815] nouveau 0000:01:00.0: bus: MMIO write of 00000002 FAULT at
4188ac [ IBUS ]
[    6.676883] nouveau 0000:01:00.0: DRM: VRAM: 2048 MiB
[    6.676884] nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
[    6.676886] nouveau 0000:01:00.0: DRM: Pointer to TMDS table invalid
[    6.676904] nouveau 0000:01:00.0: DRM: DCB version 4.0
[    6.676906] nouveau 0000:01:00.0: DRM: Pointer to flat panel table invalid
[    6.914366] nouveau 0000:01:00.0: DRM: MM: using COPY for buffer copies
[    6.914370] [drm] Initialized nouveau 1.3.0 20120801 for 0000:01:00.0 on
minor 1
[   14.829712] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw:
0, busy: 1)
[   16.831328] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw:
0, busy: 1)
[   18.832940] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw:
0, busy: 1)
[   20.834557] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw:
0, busy: 1)
[   22.836319] nouveau 0000:01:00.0: timeout at
/home/bozhan/nouveau/drm/nouveau/nvkm/engine/gr/ctxgf100.c:1365/gf100_grctx_generate()!
[   22.836389] nouveau 0000:01:00.0: gr: failed to construct context
[   22.836393] nouveau 0000:01:00.0: gr: init failed, -16


What in that bug report in launchpad is related to this one?

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--- Comment #78 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Bozhan Boyadzhiev from comment #77)
> What in that bug report in launchpad is related to this one?
 NVIDIA Corporation GK107M [GeForce GT 755M] [10de:0fcd] (rev a1) (prog-if 00
[VGA controller])
   Subsystem: Lenovo Device [17aa:3801]

The guy's got the exact same GPU as you do, and nouveau appears to come just
fine based on his dmesg. Probably OK to flip it on though... hopefully.

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--- Comment #79 from Bozhan Boyadzhiev <bozhan at abv.bg> ---
(In reply to Ilia Mirkin from comment #78)
> (In reply to Bozhan Boyadzhiev from comment #77)
> > What in that bug report in launchpad is related to this one?
> 
>  NVIDIA Corporation GK107M [GeForce GT 755M] [10de:0fcd] (rev a1) (prog-if
> 00 [VGA controller])
>    Subsystem: Lenovo Device [17aa:3801]
> 
> The guy's got the exact same GPU as you do, and nouveau appears to come
just
> fine based on his dmesg. Probably OK to flip it on though... hopefully.
As far i remember i brought my laptop after the date when the bug at launchpad
was reported and the first kernel verion which i've installed was
3.16.something.
Maybe something was changed just in that kernel versions, but my nvdia GPU
gives me this error messages since i brought my laptop.

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--- Comment #80 from bruno.pagani at ens-lyon.org ---
Well initial report was for 3.11 here, so don’t think something has changed.

Also why do you set nouveau.runpm=0? Doesn’t work without it?

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--- Comment #81 from Julien Isorce <julien.isorce at gmail.com> ---
Hi, here is the output of: sudo lspci -nnv -d 10de:0fe4
01:00.0 3D controller [0302]: NVIDIA Corporation GK107M [GeForce GT 750M]
[10de:0fe4] (rev a1)
    Subsystem: Samsung Electronics Co Ltd Device [144d:c740]
    Flags: bus master, fast devsel, latency 0, IRQ 36
    Memory at f6000000 (32-bit, non-prefetchable) [size=16M]
    Memory at e0000000 (64-bit, prefetchable) [size=256M]
    Memory at f0000000 (64-bit, prefetchable) [size=32M]
    I/O ports at e000 [size=128]
    Expansion ROM at f7000000 [disabled] [size=512K]
    Capabilities: [60] Power Management version 3
    Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
    Capabilities: [78] Express Endpoint, MSI 00
    Capabilities: [b4] Vendor Specific Information: Len=14 <?>
    Capabilities: [100] Virtual Channel
    Capabilities: [128] Power Budgeting <?>
    Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024
<?>
    Capabilities: [900] #19
    Kernel driver in use: nouveau

As I do not see any difference adding "options nouveau
config=War00C800_0=1"
/etc/modprobe.d/nouveau-kms.conf, is there a command or log to checke if it is
really set ?

Also if you can guide me what to change in
git://people.freedesktop.org/~darktama/nouveau in order to hardcode it ? I
tried to took example from :
patch "[PATCH] pci: enable c800 magic for Medion Erazer X7827" but I
am missing
these hex values. Thx

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--- Comment #82 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Julien Isorce from comment #81)
> Hi, here is the output of: sudo lspci -nnv -d 10de:0fe4
> 01:00.0 3D controller [0302]: NVIDIA Corporation GK107M [GeForce GT 750M]
> [10de:0fe4] (rev a1)
> 	Subsystem: Samsung Electronics Co Ltd Device [144d:c740]
> 
> As I do not see any difference adding "options nouveau
config=War00C800_0=1"
> /etc/modprobe.d/nouveau-kms.conf, is there a command or log to checke if it
> is really set ?
You should see the following print:

nvkm_info(&pmu->subdev, "hw bug workaround enabled\n");

in your kernel log. You need to be running Linux 4.3-rcN for that code to exist
in the driver (or a driver built from Ben's repo).

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--- Comment #83 from Julien Isorce <julien.isorce at gmail.com> ---
(In reply to Ilia Mirkin from comment #82) 
> You should see the following print:
> 
> nvkm_info(&pmu->subdev, "hw bug workaround enabled\n");
> 
> in your kernel log. You need to be running Linux 4.3-rcN for that code to
> exist in the driver (or a driver built from Ben's repo).
Thx for the info. I do not see this trace and actually it seems that the code
around the workaround is not called. Is it possible that it fails before ?
"timeout at
drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c:1478/gf100_gr_init_ctxctl"

It timeouts from gf100.c and the trace you pointed is in gk104.c, if it helps.
I added more traces in gk104_pmu_pgob and it does not print. 
(I set: echo 9 | sudo tee /sys/module/drm/parameters/debug   and  added some
nvkm_error,   nothing about "workaround" in /var/logs/kern.log")

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--- Comment #84 from Julien Isorce <julien.isorce at gmail.com> ---
I think I now why the workaround is no applied, it is because it is only for
NVE4, 6 and 7. And my GT 750M seems to be threatened as "NVC0 (GF100)    
GeForce GTX (465, 470, 480, 480M) Quadro 4000, 5000[M] (??), 6000". See
http://nouveau.freedesktop.org/wiki/CodeNames/.

Indeed it fails in gf100.c:1478/gf100_gr_init_ctxctl (i.e. GF100) instead of
going to gk104.c (i.e. NVE4 GK104, or NVE7 GK107) where the War00C800 is
handled.

Or maybe this is an expected behavior since I am not trying to use this graphic
card (GT 750M) for X11 but only for HW decoding. (the other graphic card, intel
is set to be used by the X11). 

When running LIBVA_DRIVER_NAME=gallium vainfo --display drm
It hits "case 0xe0: obj_class = NVE4_P2MF_CLASS;" in
nvc0_screen_create

#0  abi16_engobj (obj=0x613d20) at abi16.c:109
#1  0x00007ffff4163165 in nouveau_object_new (parent=parent at entry=0x613750,
handle=handle at entry=3203347007, oclass=41024, 
    data=data at entry=0x0, length=8, length at entry=0, pobj=pobj at
entry=0x613728) at
nouveau.c:295
#2  0x00007ffff50ab4c9 in nvc0_screen_create (dev=0x6131e0) at
nvc0/nvc0_screen.c:722
#3  0x00007ffff4fb9d59 in nouveau_drm_screen_create (fd=fd at entry=3) at
nouveau_drm_winsys.c:119
#4  0x00007ffff4e59944 in pipe_nouveau_create_screen (fd=3)
    at ../../../../src/gallium/auxiliary/target-helpers/inline_drm_helper.h:171
#5  dd_create_screen (fd=fd at entry=3) at
../../../../src/gallium/auxiliary/target-helpers/inline_drm_helper.h:392
#6  0x00007ffff4e5a71e in __vaDriverInit_0_38 (ctx=0x604030) at context.c:152
#7  0x00007ffff7bc10e8 in va_openDriver (dpy=dpy at entry=0x604220,
driver_name=<optimised out>) at va.c:296
#8  0x00007ffff7bc1fab in vaInitialize (dpy=dpy at entry=0x604220,
major_version=major_version at entry=0x7fffffffb820, 
    minor_version=minor_version at entry=0x7fffffffb824) at va.c:559
#9  0x00000000004015d0 in main (argc=1, argv=0x7fffffffb978) at vainfo.c:116
(gdb) n
118        dev = nouveau_object_find(obj, NOUVEAU_DEVICE_CLASS);
(gdb) n
109    {
(gdb) n
111            .channel = obj->parent->handle,
(gdb) n
110        struct drm_nouveau_grobj_alloc req = {
(gdb) n
118        dev = nouveau_object_find(obj, NOUVEAU_DEVICE_CLASS);
(gdb) n
119        ret = drmCommandWrite(dev->fd, DRM_NOUVEAU_GROBJ_ALLOC,
(gdb) n
121        if (ret)
(gdb) n
126    }
(gdb) n
nouveau_object_new (parent=parent at entry=0x613750,
handle=handle at entry=3203347007, oclass=41024, data=data at entry=0x0, 
    length=<optimised out>, length at entry=0, pobj=pobj at
entry=0x613728) at
nouveau.c:296
296                break;
(gdb) n
302        if (ret) {
(gdb) n
303            free(obj);
(gdb) n
309    }
(gdb) n
304            return ret;
(gdb) n
309    }
(gdb) n
nvc0_screen_create (dev=0x6131e0) at nvc0/nvc0_screen.c:724
724       if (ret)
(gdb) n
725          FAIL_SCREEN_INIT("Error allocating PGRAPH context for M2MF:
%d\n",
ret);
(gdb) 
ret is -16

Any idea ? Thx

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--- Comment #85 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Julien Isorce from comment #84)
> Any idea ? Thx
You have a GK107. It probably needs the PGOB fix as well as another user on
this bug needed it. See
http://cgit.freedesktop.org/nouveau/linux-2.6/commit/?h=linux-4.4&id=3c9aca318150ba1152e957a37473ff67d8ebba30
-- should be on its way to linux 4.4.

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--- Comment #86 from Julien Isorce <julien.isorce at gmail.com> ---
(In reply to Ilia Mirkin from comment #85)
> (In reply to Julien Isorce from comment #84)
> > Any idea ? Thx
> 
> You have a GK107. It probably needs the PGOB fix as well as another user on
> this bug needed it. See
> http://cgit.freedesktop.org/nouveau/linux-2.6/commit/?h=linux-4.
> 4&id=3c9aca318150ba1152e957a37473ff67d8ebba30 -- should be on its way
to
> linux 4.4.
Thx I can confirm it resolved my problem. I thought I was testing with darktama
branch few weeks ago but maybe not. Anyway I applied the patch you pointed in
the kernel tree directly (today git master). After a fresh build and install I
can confirm it works. HW decoding too :)

I only tested with patch+workaround, but maybe "patch" is enough. I
can try to
confirm tomorrow. Thx!

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--- Comment #87 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Julien Isorce from comment #86)
> I only tested with patch+workaround, but maybe "patch" is enough.
I can try
> to confirm tomorrow. Thx!
Please do -- the workaround is necessary for a fraction of users. We're
unsure
when it's safe to enable.

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--- Comment #88 from Julien Isorce <julien.isorce at gmail.com> ---
(In reply to Ilia Mirkin from comment #87)
> (In reply to Julien Isorce from comment #86)
> > I only tested with patch+workaround, but maybe "patch" is
enough. I can try
> > to confirm tomorrow. Thx!
> 
> Please do -- the workaround is necessary for a fraction of users. We're
> unsure when it's safe to enable.
I confirm the workaround "options nouveau config=War00C800_0=1" is
required
too.

You can find the two lspci outputs in comment #75 and #81 (mine).

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--- Comment #89 from Samuel Pitoiset <samuel.pitoiset at gmail.com> ---
*** Bug 87942 has been marked as a duplicate of this bug. ***

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--- Comment #90 from Wouter van Kesteren <woutershep at gmail.com> ---
Hello, i'm not exactly sure if this is the right place but i just tried
kernel
4.4.0-rc3.
I wanted to add that on my machine a manual 'c800' workaround was also
needed
to make it work.
My laptop is a Clevo barebone with 'Model: W355ST' 'Product code:
W355STQ' on
the back and dmidecode gives 'W35xSTQ_370ST'

% dmesg | grep nouveau without 'c800':

nouveau 0000:01:00.0: enabling device (0006 -> 0007)
nouveau 0000:01:00.0: NVIDIA GK106 (0e6220a1)
nouveau 0000:01:00.0: bios: version 80.06.51.00.17
nouveau 0000:01:00.0: fb: 2048 MiB GDDR5
nouveau 0000:01:00.0: bus: MMIO write of 00000004 FAULT at 620018 [ IBUS ]
nouveau 0000:01:00.0: DRM: VRAM: 2048 MiB
nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
nouveau 0000:01:00.0: DRM: Pointer to TMDS table invalid
nouveau 0000:01:00.0: DRM: DCB version 4.0
nouveau 0000:01:00.0: DRM: Pointer to flat panel table invalid
nouveau 0000:01:00.0: DRM: MM: using COPY for buffer copies
[drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 on minor 1
nouveau 0000:01:00.0: DRM: evicting buffers...
nouveau 0000:01:00.0: DRM: waiting for kernel channels to go idle...
nouveau 0000:01:00.0: DRM: suspending client object trees...
nouveau 0000:01:00.0: DRM: suspending kernel object tree...
nouveau 0000:01:00.0: DRM: resuming kernel object tree...
nouveau 0000:01:00.0: bus: MMIO write of 00000004 FAULT at 620018 [ IBUS ]
nouveau 0000:01:00.0: DRM: resuming client object trees...
nouveau 0000:01:00.0: timeout at
/root/kernel/git/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c:1479/gf100_gr_init_ctxctl()!
nouveau 0000:01:00.0: gr: 409000 - done 00000240
nouveau 0000:01:00.0: gr: 409000 - stat 00000000 00000000 00000000 00000000
nouveau 0000:01:00.0: gr: 409000 - stat 00000000 00000000 00000006 00000001
nouveau 0000:01:00.0: gr: 502000 - done 00000340
nouveau 0000:01:00.0: gr: 502000 - stat 80000000 00006500 00000000 00000000
nouveau 0000:01:00.0: gr: 502000 - stat 00000000 00000000 00000002 00000000
nouveau 0000:01:00.0: gr: 50a000 - done 00000300
nouveau 0000:01:00.0: gr: 50a000 - stat 00000000 0000f100 00000000 00000000
nouveau 0000:01:00.0: gr: 50a000 - stat 00000000 00000000 00000000 00000000
nouveau 0000:01:00.0: gr: 512000 - done 00000300
nouveau 0000:01:00.0: gr: 512000 - stat 00000000 00000000 00000000 00000000
nouveau 0000:01:00.0: gr: 512000 - stat 00000000 00000000 00000000 00000000
nouveau 0000:01:00.0: gr: init failed, -16
nouveau 0000:01:00.0: DRM: evicting buffers...
nouveau 0000:01:00.0: DRM: waiting for kernel channels to go idle...

% dmesg | grep nouveau with 'c800':

Command line: initrd=\efi\exherbo\initramfs.cpio.xz
nouveau.config=War00C800_0=1
nouveau 0000:01:00.0: enabling device (0006 -> 0007)
nouveau 0000:01:00.0: NVIDIA GK106 (0e6220a1)
nouveau 0000:01:00.0: bios: version 80.06.51.00.17
nouveau 0000:01:00.0: fb: 2048 MiB GDDR5
nouveau 0000:01:00.0: bus: MMIO write of 00000004 FAULT at 620018 [ IBUS ]
nouveau 0000:01:00.0: DRM: VRAM: 2048 MiB
nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
nouveau 0000:01:00.0: DRM: Pointer to TMDS table invalid
nouveau 0000:01:00.0: DRM: DCB version 4.0
nouveau 0000:01:00.0: DRM: Pointer to flat panel table invalid
nouveau 0000:01:00.0: DRM: MM: using COPY for buffer copies
[drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 on minor 1
nouveau 0000:01:00.0: DRM: evicting buffers...
nouveau 0000:01:00.0: DRM: waiting for kernel channels to go idle...
nouveau 0000:01:00.0: DRM: suspending client object trees...
nouveau 0000:01:00.0: DRM: suspending kernel object tree...
nouveau 0000:01:00.0: DRM: resuming kernel object tree...
nouveau 0000:01:00.0: bus: MMIO write of 00000004 FAULT at 620018 [ IBUS ]
nouveau 0000:01:00.0: DRM: resuming client object trees...
nouveau 0000:01:00.0: pmu: hw bug workaround enabled
nouveau 0000:01:00.0: pmu: hw bug workaround enabled
nouveau 0000:01:00.0: DRM: evicting buffers...
nouveau 0000:01:00.0: DRM: waiting for kernel channels to go idle...
nouveau 0000:01:00.0: DRM: suspending client object trees...
nouveau 0000:01:00.0: DRM: suspending kernel object tree...

% lspci -nnv

01:00.0 3D controller [0302]: NVIDIA Corporation GK106M [GeForce GTX 765M]
[10de:11e2] (rev a1)
    Subsystem: CLEVO/KAPOK Computer GK106M [GeForce GTX 765M] [1558:3537]
    Flags: bus master, fast devsel, latency 0, IRQ 26
    Memory at f6000000 (32-bit, non-prefetchable) [size=16M]
    Memory at e0000000 (64-bit, prefetchable) [size=256M]
    Memory at f0000000 (64-bit, prefetchable) [size=32M]
    I/O ports at e000 [size=128]
    Expansion ROM at f7000000 [disabled] [size=512K]
    Capabilities: [60] Power Management version 3
    Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
    Capabilities: [78] Express Endpoint, MSI 00
    Capabilities: [b4] Vendor Specific Information: Len=14 <?>
    Capabilities: [100] Virtual Channel
    Capabilities: [128] Power Budgeting <?>
    Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024
<?>
    Capabilities: [900] #19
    Kernel driver in use: nouveau

I think this should be enough info to put the workaround in the kernel right?

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--- Comment #91 from Bozhan Boyadzhiev <bozhan at abv.bg> ---
(In reply to bruno.pagani from comment #80)
> Well initial report was for 3.11 here, so don’t think something has
changed.
> 
> Also why do you set nouveau.runpm=0? Doesn’t work without it?
It is not needed.

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #92 from Ilia Mirkin <imirkin at alum.mit.edu> ---
The latest kernel, 4.4-rc5, actually enables this workaround by default, for
everyone. Marking this as fixed.

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--- Comment #93 from Bozhan Boyadzhiev <bozhan at abv.bg> ---
Ilia, 
what about this messages:

nouveau 0000:01:00.0: DRM: Pointer to TMDS table invalid
nouveau 0000:01:00.0: DRM: Pointer to flat panel table invalid
bus: MMIO write of 00000002 FAULT at 4188ac [ IBUS ]

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--- Comment #94 from bruno.pagani at ens-lyon.org ---
So, after 4.4 landed on Arch, finally got this working.

Though, like previous poster, I have some messages in dmesg:

[  336.351782] nouveau 0000:02:00.0: bus: MMIO write of 00000002 FAULT at
4188ac [ IBUS ]
[  336.410877] nouveau 0000:02:00.0: DRM: Pointer to TMDS table invalid
[  336.410880] nouveau 0000:02:00.0: DRM: Pointer to flat panel table invalid

Should I open a new bug for those?

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https://bugs.freedesktop.org/show_bug.cgi?id=70354

--- Comment #95 from Bruno Pagani <bruno.n.pagani at gmail.com> ---
(In reply to Bruno Pagani from comment #94)
> So, after 4.4 landed on Arch, finally got this working.
> 
> Though, like previous poster, I have some messages in dmesg:
> 
> [  336.351782] nouveau 0000:02:00.0: bus: MMIO write of 00000002 FAULT at
> 4188ac [ IBUS ]
> [  336.410877] nouveau 0000:02:00.0: DRM: Pointer to TMDS table invalid
> [  336.410880] nouveau 0000:02:00.0: DRM: Pointer to flat panel table
invalid
> 
> Should I open a new bug for those?
Just in case someone was passing by this thread, the follow-up has been here:
https://bugs.freedesktop.org/show_bug.cgi?id=98386

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