Nouveau - Oct 2013 - [Bug 70972] New: Nouveau fails with broken screen on nv40 with kernel 3.12

https://bugs.freedesktop.org/show_bug.cgi?id=70972

          Priority: medium
            Bug ID: 70972
          Assignee: nouveau at lists.freedesktop.org
           Summary: Nouveau fails with broken screen on nv40 with kernel
                    3.12
        QA Contact: xorg-team at lists.x.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: larry.finger at lwfinger.net
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

Created attachment 88259
  --> https://bugs.freedesktop.org/attachment.cgi?id=88259&action=edit
Output of dmesg

With nouveau on the graphics adapter on an HP dv2815nr laptop, both console and
X displays show an incorrect scan length with a resulting garbled screen.

The 'lspci -nnv' for this adapter is

00:12.0 VGA compatible controller [0300]: NVIDIA Corporation C67 [GeForce 7150M
/ nForce 630M] [10de:0531] (rev a2) (prog-if 00 [VGA controller])
        Subsystem: Hewlett-Packard Company Device [103c:30d6]
        Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 10
        Memory at f4000000 (32-bit, non-prefetchable) [size=16M]
        Memory at d0000000 (64-bit, prefetchable) [size=256M]
        Memory at f0000000 (64-bit, non-prefetchable) [size=16M]
        [virtual] Expansion ROM at c0000000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel modules: nouveau

This device has never worked with nouveau on any kernel. I am trying to make it
work now as the nv driver is failing in certain cases, and fbdev cannot use the
optimum resolution (1600 x 800) for this laptop.

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--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
I believe you attached the wrong dmesg, that one seems more relevant to b43 dev
work...

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--- Comment #2 from Larry Finger <larry.finger at lwfinger.net> ---
Sorry about that. Let me generate a proper dmesg and post it.

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Larry Finger <larry.finger at lwfinger.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #88259|0                           |1
        is obsolete|                            |

--- Comment #3 from Larry Finger <larry.finger at lwfinger.net> ---
Created attachment 88953
  --> https://bugs.freedesktop.org/attachment.cgi?id=88953&action=edit
Correct dmesg output for nouveau

This attachment is the proper one to show the dmesg problem. On this boot, X
did not start due to an xorg.d file calling for driver nv; however, the console
output showed the line breaking.

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--- Comment #5 from Larry Finger <larry.finger at lwfinger.net> ---
Yes, I did mean 1280x800.

Thanks for the hint. I will look at the two routines you suggest.

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--- Comment #6 from Larry Finger <larry.finger at lwfinger.net> ---
I tested 640x480. After X started, it was OK for about 5 seconds, and then it
failed in the same way as 1280x800.

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--- Comment #7 from Ilia Mirkin <imirkin at alum.mit.edu> ---
No clue if this will help, but we recently noticed that the NV4x IGP's have
some differences in register placement. Perhaps this patch:

http://lists.freedesktop.org/archives/nouveau/2014-February/016033.html

will help something. (See nouveau list for another patch that possibly fixes
MSI that comes with 3.13.)

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--- Comment #8 from Larry Finger <larry.finger at lwfinger.net> ---
I am now running 3.14-rc1, and the MSI changes for 3.13 should be in my kernel.

I added the patch mentioned in comment #7. I did not alter my xorg.conf.d setup
and X did not start, but I still had the screen double-up/faulty wrap in the
text screen.

Thanks for notifying me. Perhaps there are other register location differences.

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--- Comment #9 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Well, unrelated to this issue, you probably need

http://lists.freedesktop.org/archives/nouveau/2014-February/016032.html

For MSI to work properly. We've had reports of issues for people on NV4E,
and
it's also been confirmed that the registers are in a different place for
NV63.
It's very likely to also be different on NV67. You can also disable MSI by
using nouveau.config=NvMSI=0 . (However if you can confirm that this patch
either helps or breaks things, that would be nice -- not a lot of people with
this HW.)

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--- Comment #10 from Larry Finger <larry.finger at lwfinger.net> ---
Unfortunately, neither the patch nor the patch and the nouveau.config boot
change made any difference.

I certainly understand that not many people have this hardware.

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--- Comment #11 from ade <adloconwy+freebug at gmail.com> ---
I also have an NVIDIA GeForce 7150m / nForce 630m and I am also experiencing
this problem. The screen is garbled in both X and the console.

I noticed that xrandr detects a load on TV-1 even though nothing is connected
to this port. I have tried setting the video=TV-1:d and nouveau.tv_disable=1
kernel options, but neither of these have any effect.

I can get a clear image if I set the resolution to 1024x768, but this is not
ideal as this is not my monitor's native resolution.

I am wondering if the cause of the garbled screen could be TV-out misdetection?

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--- Comment #12 from Ilia Mirkin <imirkin at alum.mit.edu> ---
A few things to try if you're feeling motivated to resolve this:

(a) Does setting the mode work properly with the xf86-video-nv driver (and with
nouveau entirely disabled)? If so, try to see what the two are doing
differently.

(b) What about nvidiafb (drivers/video/nvidia)?

(c) Do a mmiotrace of the blob and compare what it's doing to what
nouveau's
doing.

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--- Comment #13 from ade <adloconwy+freebug at gmail.com> ---
I tried the nv driver and it did not list any resolutions above 1024x768, so I
could not find out if it would work at 1280x800.

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--- Comment #14 from adlo <adloconwy+freebug at gmail.com> ---
Created attachment 115254
  --> https://bugs.freedesktop.org/attachment.cgi?id=115254&action=edit
mmiotrace of NVIDIA proprietary driver

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adlo <adloconwy+freebug at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #115254|mmiotrace_nvidia.tar.xz     |mmiotrace_GeForce_7150M_nFo
           filename|                            |rce_630M_nvidia.tar.xz

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--- Comment #15 from Larry Finger <larry.finger at lwfinger.net> ---
I no longer have the computer with the adaptor that failed. I now am using a
machine with a GeForce 7150M/nForce 630M with PCI ID 10de:0531. It works
perfectly with nouveau.

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--- Comment #16 from adlo <adloconwy+freebug at gmail.com> ---
Created attachment 115278
  --> https://bugs.freedesktop.org/attachment.cgi?id=115278&action=edit
mmiotrace with glxgears

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adlo <adloconwy+freebug at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #115254|mmiotrace of NVIDIA         |mmiotrace
        description|proprietary driver          |

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--- Comment #17 from adlo <adloconwy+freebug at gmail.com> ---
(In reply to Larry Finger from comment #15)
> I no longer have the computer with the adaptor that failed. I now am using
a
> machine with a GeForce 7150M/nForce 630M with PCI ID 10de:0531. It works
> perfectly with nouveau.
>From what I've heard, it would seem that some GeForce 7150M/nForce 630Ms
work
perfectly with nouveau, while others exhibit the garbled screen problem. I
wonder why this could be?

What is the screen resolution of your new machine?

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--- Comment #18 from Larry Finger <larry.finger at lwfinger.net> ---
It is 1280x800.

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adlo <adloconwy+freebug at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #115254|mmiotrace_GeForce_7150M_nFo |mmiotrace_GeForce_7150M_nFo
           filename|rce_630M_nvidia.tar.xz      |rce_630M_proprietary.tar.xz
 Attachment #115254|mmiotrace                   |mmiotrace of NVIDIA
        description|                            |proprietary driver

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--- Comment #19 from adlo <adloconwy+freebug at gmail.com> ---
Could anyone assist with analysing my mmiotrace?

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adlo <adloconwy+freebug at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #115278|mmiotrace_GeForce_7150M_nFo |mmiotrace_GeForce_7150M_nFo
           filename|rce_630M_glxgears.tar.xz    |rce_630M_proprietary_glxgea
                   |                            |rs.tar.xz
 Attachment #115278|mmiotrace with glxgears     |mmiotrace of NVIDIA
        description|                            |proprietary driver with
                   |                            |glxgears

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--- Comment #20 from adlo <adloconwy+freebug at gmail.com> ---
Is it possible for anyone at your end to do some analysis based on the
information I have provided so far?

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--- Comment #21 from Viktor Sidochenko <clicman at yandex.ru> ---
I have laptop with NVIDIA Corporation C67 [GeForce 7150M / nForce 630M]
[10de:0531] (rev a2) card onboard and native 1280x800 resolution. And it shows
broken picture with nouveau. 

Full info with  lspci -nnv:

00:12.0 VGA compatible controller [0300]: NVIDIA Corporation C67 [GeForce 7150M
/ nForce 630M] [10de:0531] (rev a2) (prog-if 00 [VGA controller])
    Subsystem: Hewlett-Packard Company Device [103c:30cf]
    Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 16
    Memory at f5000000 (32-bit, non-prefetchable) [size=16M]
    Memory at d0000000 (64-bit, prefetchable) [size=256M]
    Memory at f4000000 (64-bit, non-prefetchable) [size=16M]
    [virtual] Expansion ROM at f6280000 [disabled] [size=128K]
    Capabilities: [48] Power Management version 2
    Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
    Kernel driver in use: nvidia

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--- Comment #22 from Nerijus Baliūnas <nerijus at users.sourceforge.net>
---
I have GeForce 7150M / nForce 630M and it shows garbled screen with 1280x800
resolution. 1024x768 works OK, as well as proprietary nvidia driver.
I tried a few modelines generated with cvt 1280 800, cvt 1280 800 59, cvt 1280
800 57, cvt 1280 800 50 - does not help, still the garbled screen. Adding
nouveau.config=NvMSI=0 to kernel boot line did not help neither.
Fedora 25 beta, xorg-x11-drv-nouveau-1.0.13-1.fc25.x86_64.

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--- Comment #23 from Nerijus Baliūnas <nerijus at users.sourceforge.net>
---
Tried nv driver, 1280x800 garbled screen too, 1024x768 OK.

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--- Comment #24 from Ilia Mirkin <imirkin at alum.mit.edu> ---
It would be helpful to have a mmiotrace of nouveau attempting to do the
modeset. The code's not exactly easy to read, and this should make it easy
to
compare 1:1.

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--- Comment #25 from Nerijus Baliūnas <nerijus at users.sourceforge.net>
---
Created attachment 127258
  --> https://bugs.freedesktop.org/attachment.cgi?id=127258&action=edit
mmiotrace when changing resolutions with nouveau

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--- Comment #26 from Nerijus Baliūnas <nerijus at users.sourceforge.net>
---
I ran commands:
echo mmiotrace > /sys/kernel/debug/tracing/current_tracer
cat /sys/kernel/debug/tracing/trace_pipe > mydump.txt &
xrandr -s 1280x800 - screen became garbled
xrandr -s 1024x768 - screen became OK

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--- Comment #27 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Nerijus Baliūnas from comment #25)
> Created attachment 127258 [details]
> mmiotrace when changing resolutions with nouveau
A successful mmiotrace should be 10-100MB or so. (Use xz -9 to compress it.)

Have a look at https://wiki.ubuntu.com/X/MMIOTracing for a guide on how to
trace properly. The trace needs to be started before nouveau loads.

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--- Comment #28 from Nerijus Baliūnas <nerijus at users.sourceforge.net>
---
Booted to console, ran
echo 64000 > /sys/kernel/debug/tracing/buffer_size_kb
echo mmiotrace > /sys/kernel/debug/tracing/current_tracer
cat /sys/kernel/debug/tracing/trace_pipe > mmiotrace.log &
modprobe nouveau
init 5
xrandr -s 1024x768 - screen became OK
xrandr -s 1280x800 - screen became garbled

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Nerijus Baliūnas <nerijus at users.sourceforge.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #127258|0                           |1
        is obsolete|                            |

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--- Comment #29 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Nerijus Baliūnas from comment #28)
> Booted to console, ran
> echo 64000 > /sys/kernel/debug/tracing/buffer_size_kb
> echo mmiotrace > /sys/kernel/debug/tracing/current_tracer
> cat /sys/kernel/debug/tracing/trace_pipe > mmiotrace.log &
> modprobe nouveau
> init 5
> xrandr -s 1024x768 - screen became OK
> xrandr -s 1280x800 - screen became garbled
Does the console not become garbled when you just run 'modprobe nouevau'
and it
flips to 1280x800 mode? Or does it go into some other mode?

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--- Comment #30 from Nerijus Baliūnas <nerijus at users.sourceforge.net>
---
Created attachment 127259
  --> https://bugs.freedesktop.org/attachment.cgi?id=127259&action=edit
mmiotrace of nouveau

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--- Comment #31 from Nerijus Baliūnas <nerijus at users.sourceforge.net>
---
(In reply to Ilia Mirkin from comment #29)
> Does the console not become garbled when you just run 'modprobe
nouevau' and
> it flips to 1280x800 mode? Or does it go into some other mode?
It becomes garbled. It does not if I boot with video=LVDS-1:1024x768

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--- Comment #32 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Nerijus Baliūnas from comment #31)
> (In reply to Ilia Mirkin from comment #29)
> > Does the console not become garbled when you just run 'modprobe
nouevau' and
> > it flips to 1280x800 mode? Or does it go into some other mode?
> It becomes garbled. It does not if I boot with video=LVDS-1:1024x768
OK. And if it's not too difficult, mind taking a photograph of the garbling?

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--- Comment #33 from Nerijus Baliūnas <nerijus at users.sourceforge.net>
---
Created attachment 127260
  --> https://bugs.freedesktop.org/attachment.cgi?id=127260&action=edit
garbled X photo

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--- Comment #34 from Nerijus Baliūnas <nerijus at users.sourceforge.net>
---
Created attachment 127261
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garbled console photo

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Sérgio M. Basto <sergio at serjux.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sergio at serjux.com

--- Comment #35 from Sérgio M. Basto <sergio at serjux.com> ---
OK but you don't test many drive options that you have in nouveau drive [1] 

Option "AccelMethod" 0 

Option "WrappedFB" 1

              Enable  or  disable  wfb,  only  affects  nv50+. Useful for some
legacy configurations where high rendering
              latency is perceived.  Default: wfb is disabled.

Option "PageFlip" 0

etc 

Also in Fedora 25 we got xf86-video-nouveau 1.0.15 last report was 1.0.13

[1] 
man nouveau

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--- Comment #36 from Nerijus Baliūnas <nerijus at users.sourceforge.net>
---
Just tried with 1.0.15 and options
        Option "AccelMethod" "none"
        Option "WrappedFB" "on"
        Option "PageFlip" "off"
Nothing changed, the screen is garbled.

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--- Comment #37 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Modesetting is all done in the kernel, so no xf86-video-nouveau options will
affect it one way or the other.

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--- Comment #38 from Nerijus Baliūnas <nerijus at users.sourceforge.net>
---
Is there any possibility to make 1280x800 work? 
304xx is going to be retired at the end of the year by nvidia.
http://nvidia.custhelp.com/app/answers/detail/a_id/3142

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--- Comment #39 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Nerijus Baliūnas from comment #38)
> Is there any possibility to make 1280x800 work? 
> 304xx is going to be retired at the end of the year by nvidia.
> http://nvidia.custhelp.com/app/answers/detail/a_id/3142
If the NVIDIA driver can do it, that means that there's a possibility.
Patches
welcome.

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--- Comment #40 from Nerijus Baliūnas <nerijus at users.sourceforge.net>
---
Where in the source should I look?

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--- Comment #41 from Ilia Mirkin <imirkin at alum.mit.edu> ---
All of the modesetting logic (for pre-G80 chips) lives in

drivers/gpu/drm/nouveau/dispnv04

This is mostly an adaptation of xf86-video-nv to work in the kernel, with some
IMHO misguided "cleanups" that were applied to some of the
incomprehensible
clock/etc calculation code. Unfortunately those are also mixed in with legit
fixes, so it's hard to undo.

Either way, since xf86-video-nv also reputedly can't make 1280x800 work,
reading that source is unlikely to be of much help. However at least the NV1A
and NV1F IGP's tend to have their own very special clock calculation logic,
so
perhaps that's missing (might look at what e.g. NV4C/NV4E do, as those
allegedly work well).

There are already traces of both the blob and nouveau and how they perform the
modesetting (see attachments in this bug). What's largely missing is
identifying what nouveau does differently, and then coming up with a way to fix
it.

You can use 'demmio' from envytools to help analyze the traces
(https://github.com/envytools/envytools).

If you have questions about the tooling or the code, feel free to join in
#nouveau on irc.freenode.net.

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Martin Peres <martin.peres at free.fr> changed:

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

--- Comment #42 from Martin Peres <martin.peres at free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
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You can subscribe and participate further through the new bug through this link
to our GitLab instance:
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