amdgpu: Reproducible soft lockups when playing games

[Marcus Rückert]

On Wed, 2025-04-30 at 09:55 -0400, Alex Deucher wrote:
> please make sure your kernel has these three patches:
> https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4408b59eeacfea777aae397177f49748cadde5ce
> https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=afcdf51d97cd58dd7a2e0aa8acbaea5108fa6826
> https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=366e77cd4923c3aa45341e15dcaf3377af9b042f

I am kinda sure that's the patches Takashi backported into our 6.14.3.
They are already part of 6.15.rc4 no?

> soft recover kills stuck shaders, so I'd suggest trying a newer
> version of mesa and LLVM.  If that doesn't help, please file a ticket
> here:

Newer Mesa is building although I didnt see anything radv related.

I am curious in https://gitlab.freedesktop.org/drm/amd/-/issues/4192
there is a lot more details about the crash than what I see. with what
kind of flags/environment variables do I have to run to get the same?

An observation from my latest crash:

```
May 01 01:05:59 steam[223306]: radv/amdgpu: The CS has been cancelled
because the context is lost. This context is guilty of a soft recovery.
May 01 01:06:05 steam[223306]: Game Recording - game stopped
[gameid=2357570]
May 01 01:06:05 steam[223306]: Removing process 352353 for gameID
2357570
```

Is the game launched by steam inheriting that context or could it
really be the steam process triggering it? As 223306 would be


```
~/.local/share/Steam/ubuntu12_32/steam-runtime/usr/libexec/steam-
runtime-tools-0/srt-logger --sh-syntax --rotate=8388608 --log-directory
/home/darix/.local/share/Steam/logs --filename console-linux.txt --log-
fd=7 --journal-fd=5 --parse-level-prefix
```

It claims "game recording" but that is actually turned off and their
LD_PRELOAD-s are blocked because of
https://github.com/ValveSoftware/steam-for-linux/issues/11446

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