[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 #22 from Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer at amd.com> ---

> Okay I just got another random hang on the desktop. even with the
> environment variable turned on the whole time. Unfortunately it seems to be
> very hardly tracable seems to be very random :( Seems that Citra hang is
> unrelated to this bug after all, it's a completely different bug. It's good
> that we discovered another (citra-related) bug on the way but probably we
> can't mark that workaround to solve anything because hangs still randomly
> occur on the desktop.

Yes, it's possible that there are different bugs.

For the citra bug: I suspect an issue with Geometry Shaders + NGG but this will
require more debugging to confirm (also: using wavesize=64 didn't help, so it's
not a regression caused by a0d330bedb9e).

I'm also testing using AMD_DEBUG=nodma system wide to see if it prevents the
sdma0 kind of hangs.

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