Nouveau - Oct 2017 - [Bug 103421] New: Kernel 4.13+ nouveau breaks screen output

https://bugs.freedesktop.org/show_bug.cgi?id=103421

            Bug ID: 103421
           Summary: Kernel 4.13+ nouveau breaks screen output
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: kbaikov at suse.com
        QA Contact: xorg-team at lists.x.org

Created attachment 135010
  --> https://bugs.freedesktop.org/attachment.cgi?id=135010&action=edit
kernel log

There is a regression with my

02:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF119 [NVS
310] [10de:107d] (rev a1)

where I would not get any graphics output anymore with Linux kernel
4.13.x, not even (framebuffer) text consoles.

There is a NULL pointer dereference around nvkm_dp_train_drive
visible in dmesg (attached)

and looking at the nouveau.ko disassembly, the faulting instruction was
a call to a variable address e.g. from
drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c:
        ior->func->dp.drive(ior, i, ocfg.pc, ocfg.dc,
                                    ocfg.pe, ocfg.tx_pu);

which was introduced in commit af85389c614ae
so maybe you have a hint at what might be wrong or how to further debug
this problem...


With 4.12.8, there was a different NULL pointer deref but some working
graphics.
I also tried 4.14-rc3 or such but that still had broken graphics.

Thanks in advance for any help

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Andrey Mazo <ahippo at yandex.ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ahippo at yandex.ru

--- Comment #1 from Andrey Mazo <ahippo at yandex.ru> ---
I'm seeing the same problem on 4.13.11.

I have the same video card:
03:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF119 [NVS 310]
[10de:107d] (rev a1)

And a NULL pointer dereference:
[    2.354551] nouveau 0000:03:00.0: DRM: allocated 1920x1080 fb: 0x60000, bo
ffffa3167a6b2000
[    2.455441] BUG: unable to handle kernel NULL pointer dereference at        
  (null)
[    2.455444] IP:           (null)
[    2.455445] PGD 0
[    2.455446] P4D 0

[    2.455448] Oops: 0010 [#1] SMP
[    2.455449] Modules linked in:
...
[    2.455471] Call Trace:
[    2.455476]  ? nvkm_dp_train_drive+0x1e8/0x2d0
[    2.455479]  nvkm_dp_acquire+0x8eb/0xcd0
[    2.455482]  nv50_disp_super_2_2+0x6b/0x430
[    2.455486]  ? nvkm_devinit_pll_set+0xa/0x10
[    2.455487]  gf119_disp_super+0x1ac/0x2f0
[    2.455492]  process_one_work+0x193/0x430
[    2.455493]  ? process_one_work+0x136/0x430
[    2.455495]  worker_thread+0x49/0x450
[    2.455499]  kthread+0x109/0x140
[    2.455500]  ? create_worker+0x1a0/0x1a0
[    2.455502]  ? kthread_create_on_node+0x40/0x40
[    2.455509]  ret_from_fork+0x27/0x40
[    2.455510] Code:  Bad RIP value.
[    2.455514] RIP:           (null) RSP: ffffbeed062afc10
[    2.455514] CR2: 0000000000000000
[    2.455517] ---[ end trace 85d5c96bafea0973 ]---

Please, see the full kernel.log attached.

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--- Comment #2 from Andrey Mazo <ahippo at yandex.ru> ---
Created attachment 135364
  --> https://bugs.freedesktop.org/attachment.cgi?id=135364&action=edit
kernel log

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--- Comment #3 from m-mickan at mailbox.org ---
I think I have the same issue with the mobile version of that card:

01:00.0 VGA compatible controller: NVIDIA Corporation GF119M [Quadro NVS 4200M]
(rev a1)

It is an optimus setup, so the nvidia card is only used when I plug in a
monitor into the DisplayPort.

I compiled the kernel with commit af85389c614ae04970c0eea7a5c50fb889c8a480 and
its parent.
With the parent, there were no error messages from the kernel, but the output
was static and full of glitches. With the mentioned commit, there were error
messages from the kernel and no output at all.

I attached the kernel log (with kernel version 4.13.11) and the dmesg output
after plugging in a monitor into the Displayport (kernel compiled from commit
af85389c614ae).

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--- Comment #4 from m-mickan at mailbox.org ---
Created attachment 135374
  --> https://bugs.freedesktop.org/attachment.cgi?id=135374&action=edit
kernel log

4.13.11

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--- Comment #5 from m-mickan at mailbox.org ---
Created attachment 135375
  --> https://bugs.freedesktop.org/attachment.cgi?id=135375&action=edit
dmesg after plugging monitor in

Commit: af85389c614ae04970c0eea7a5c50fb889c8a480

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--- Comment #6 from Rob Clark <robclark at freedesktop.org> ---
This patch should fix the issue:

https://patchwork.freedesktop.org/patch/196301/

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--- Comment #7 from kbaikov at suse.com ---
I can confirm that this patch fixes the issue:

https://patchwork.freedesktop.org/patch/196301/

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--- Comment #8 from Nikita <nikita at leshenko.net> ---
I tested this patch and I can confirm that it fixed the issue.

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Sven Joachim <svenjoac at gmx.de> changed:

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

--- Comment #9 from Sven Joachim <svenjoac at gmx.de> ---
The patch in Comment 6 has been in Linus' tree since 4.15-rc8, and I have
just
requested that it should be applied to 4.14 as well.

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