[Bug 111481] AMD Navi GPU frequent freezes on both Manjaro/Ubuntu with kernel 5.3 and mesa 19.2 -git/llvm9

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111481

--- Comment #20 from Marko Popovic <popovic.marko at protonmail.com> ---
(In reply to Pierre-Eric Pelloux-Prayer from comment #19)
> Thanks for the trace!
> 
> Replaying the trace a few times is enough to reliably to reproduce the hang.
> 
> Using AMD_DEBUG=nongg seems to prevent it so it could be a temporary
> workaround until a proper fix is found.
> Could you confirm this on your system?
> 
> 
> > 
> > I am adding Rocket League crash output from apitrace.
> 
> This trace file is very small (only one frame) and doesn't hang here.

Thanks for the workaround! Here are my results:

-AMD_DEBUG=nongg works to fix the Citra-related crash

- It doesn't work to fix Rocket League related hang, that seems to be a
completely different beast... the GPU hang happens as well but I don't know
why, apparently apitrace doesn't provide any useful information as to why it
happens.

Now I will continue testing to see whether citra-related crash workaround also
works for my desktop random freezes and hangs and will report back. I added
AMD_DEBUG=nongg to my /etc/environment so it should be applied to desktop as
well.

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