Nouveau - Dec 2018 - [Bug 108982] New: GM206: MMIO write of 800000ec FAULT at 10eb14 [ IBUS ]

https://bugs.freedesktop.org/show_bug.cgi?id=108982

            Bug ID: 108982
           Summary: GM206: MMIO write of 800000ec FAULT at 10eb14 [ IBUS ]
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: adamos at hell.factory.net.pl
        QA Contact: xorg-team at lists.x.org

i7-6700, GM206 [GTX 950]
No touch screen, no hybrid graphics. Pure box. Intel 530 on chip but disabled
in BIOS. Only one Asus Graphic Card.
Problem started on Kernel 4.10.x and is going on next kernels. Kernel 4.9.x is
FAULT free. Different distributions Fedora, Gentoo.

dmesg | grep nouveau
[   11.511078] fb: switching to nouveaufb from EFI VGA
[   11.511602] nouveau 0000:01:00.0: NVIDIA GM206 (126020a1)
[   11.601757] nouveau 0000:01:00.0: bios: version 84.06.3d.00.6f
[   11.885711] nouveau 0000:01:00.0: fb: 2048 MiB GDDR5
[   11.885746] nouveau 0000:01:00.0: bus: MMIO write of 800000ec FAULT at
10eb14 [ IBUS ]
[   11.979550] nouveau 0000:01:00.0: DRM: VRAM: 2048 MiB
[   11.979551] nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
[   11.979553] nouveau 0000:01:00.0: DRM: TMDS table version 2.0
[   11.979554] nouveau 0000:01:00.0: DRM: DCB version 4.1
[   11.979556] nouveau 0000:01:00.0: DRM: DCB outp 00: 01000f02 00020030
[   11.979558] nouveau 0000:01:00.0: DRM: DCB outp 01: 02000f00 00000000
[   11.979559] nouveau 0000:01:00.0: DRM: DCB outp 02: 02811f66 04400010
[   11.979560] nouveau 0000:01:00.0: DRM: DCB outp 03: 02011f62 00020010
[   11.979562] nouveau 0000:01:00.0: DRM: DCB outp 04: 02022f72 00020020
[   11.979563] nouveau 0000:01:00.0: DRM: DCB outp 05: 04033f82 00020030
[   11.979564] nouveau 0000:01:00.0: DRM: DCB outp 15: 01df4ff8 00000000
[   11.979566] nouveau 0000:01:00.0: DRM: DCB conn 00: 00001030
[   11.979567] nouveau 0000:01:00.0: DRM: DCB conn 01: 00010146
[   11.979568] nouveau 0000:01:00.0: DRM: DCB conn 02: 00020261
[   11.979569] nouveau 0000:01:00.0: DRM: DCB conn 03: 02000331
[   11.979570] nouveau 0000:01:00.0: DRM: DCB conn 04: 00000470
[   11.982170] nouveau 0000:01:00.0: DRM: failed to create encoder 1/8/0: -19
[   11.982172] nouveau 0000:01:00.0: DRM: Virtual-1 has no encoders, removing
[   12.233674] nouveau 0000:01:00.0: DRM: MM: using COPY for buffer copies
[   12.429065] nouveau 0000:01:00.0: DRM: allocated 2560x1440 fb: 0xa0000, bo
000000000065bfd7
[   12.429187] fbcon: nouveaufb (fb0) is primary device
[   12.564503] nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device
[   12.587799] [drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 on
minor 0

01:00.0 VGA compatible controller: NVIDIA Corporation GM206 [GeForce GTX 950]
(rev a1) (prog-if 00 [VGA controller])
        Subsystem: ASUSTeK Computer Inc. GM206 [GeForce GTX 950]
        Flags: bus master, fast devsel, latency 0, IRQ 136
        Memory at de000000 (32-bit, non-prefetchable) [size=16M]
        Memory at c0000000 (64-bit, prefetchable) [size=256M]
        Memory at d0000000 (64-bit, prefetchable) [size=32M]
        I/O ports at e000 [size=128]
        Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: [60] Power Management version 3
        Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [78] Express Legacy Endpoint, MSI 00
        Capabilities: [100] Virtual Channel
        Capabilities: [258] L1 PM Substates
        Capabilities: [128] Power Budgeting <?>
        Capabilities: [420] Advanced Error Reporting
        Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024
<?>
        Capabilities: [900] #19
        Kernel driver in use: nouveau
        Kernel modules: nouveau


xf86-video-nouveau-1.0.15-r1
libdrm-2.4.96
kernel-4.19.6

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https://bugs.freedesktop.org/show_bug.cgi?id=108982

--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Interesting. The only write I see to that register is in the GM107 fan control
logic. This is not used for GM200+, as controlling the fan can't be done
anymore, except via secure firmware means.

So ... my *guess* is that this is a write failure that happens as a result of
the firmware that gets loaded, which is not supplied by nouveau. (Always
preferable to blame someone else...)

Can you get a dmesg with nouveau.debug=trace which should place that error more
exactly in the initialization flow.

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--- Comment #2 from Johnny B. Goode <adamos at hell.factory.net.pl> ---
Created attachment 142762
  --> https://bugs.freedesktop.org/attachment.cgi?id=142762&action=edit
GM206 nouveau.debug trace

journalctl -b -1 --no-hostname -o short-monotonic | grep nouveau

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--- Comment #3 from Johnny B. Goode <adamos at hell.factory.net.pl> ---
Created attachment 142763
  --> https://bugs.freedesktop.org/attachment.cgi?id=142763&action=edit
GM206 nouveau.debug trace2

Once again, because the first one was without -b -1 parameter, so without
closing nouveau.
journalctl -b -1 --no-hostname -o short-monotonic | grep nouveau

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--- Comment #4 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Johnny B. Goode from comment #3)
> Created attachment 142763 [details]
> GM206 nouveau.debug trace2
> 
> Once again, because the first one was without -b -1 parameter, so without
> closing nouveau.
> journalctl -b -1 --no-hostname -o short-monotonic | grep nouveau
I could be mistaken, but there's no MMIO errors in there... which means
it's
intermittent, perhaps based on boot state or something else. I do think it's
the secure firmware doing this.

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--- Comment #5 from Johnny B. Goode <adamos at hell.factory.net.pl> ---
Created attachment 142870
  --> https://bugs.freedesktop.org/attachment.cgi?id=142870&action=edit
Rom

Rom bios because Asus made few cards GTX 950 with different bioses
hxxps://www.techpowerup.com/vgabios/?architecture=NVIDIA&manufacturer=Asus&model=GTX+950&interface=&memType=&memSize=&sinceMine
is 84.06.3d.00.6f

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--- Comment #6 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Johnny B. Goode from comment #5)
> Created attachment 142870 [details]
> Rom
> 
> Rom bios because Asus made few cards GTX 950 with different bioses
> hxxps://www.techpowerup.com/vgabios/
>
?architecture=NVIDIA&manufacturer=Asus&model=GTX+950&interface=&memType=&memS
> ize=&since> Mine is 84.06.3d.00.6f
I was referring to the firmware that's supplied by NVIDIA in linux-firmware,
which has to be loaded to operate any of the acceleration components of the
board.

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

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

--- Comment #7 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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