[Nouveau] [REGRESSION]: nouveau: Asynchronous wait on fence

[Owen T. Heisler]

On 11/21/23 09:16, Linux regression tracking (Thorsten Leemhuis) wrote:
> On 15.11.23 07:19, Owen T. Heisler wrote:
>> On 10/31/23 04:18, Linux regression tracking (Thorsten Leemhuis) wrote:
>>> On 28.10.23 04:46, Owen T. Heisler wrote:
>>>> #regzbot introduced: d386a4b54607cf6f76e23815c2c9a3abc1d66882
>>>> #regzbot link: https://gitlab.freedesktop.org/drm/nouveau/-/issues/180
>>>>
>>>> ## Problem
>>>>
>>>> 1. Connect external display to DVI port on dock and run X with both
>>>>      displays in use.
>>>> 2. Wait hours or days.
>>>> 3. Suddenly the secondary Nvidia-connected display turns off and X stops
>>>>      responding to keyboard/mouse input. In *some* cases it is
>>>> possible to
>>>>      switch to a virtual TTY with Ctrl+Alt+Fn and log in there.

>> Here is a decoded kernel log from an
>> untainted kernel:
>>
>> https://gitlab.freedesktop.org/drm/nouveau/uploads/c120faf09da46f9c74006df9f1d14442/async-wait-on-fence-180.log

> Maybe one of the nouveau developer can take a quick look at
> d386a4b54607cf and suggest a simple way to revert it in latest mainline.
> Maybe just removing the main chunk of code that is added is all that it
> takes.

I was able to resolve the revert conflict; it was indeed trivial though 
I did not realize it initially. I am currently testing v6.6 with the 
culprit commit reverted. I need to test for at least a full week (ending 
11-23) before I can assume it fixes the problem.

After that I can try the latest v6.7-rc as you suggested.

I have updated the bug description at
<https://gitlab.freedesktop.org/drm/nouveau/-/issues/180>.

Thanks again,
Owen

--
Owen T. Heisler
<https://owenh.net>