[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 bugzilla-daemon at freedesktop.org
Mon Sep 2 17:05:49 UTC 2019


--- Comment #23 from Marko Popovic <popovic.marko at protonmail.com> ---
(In reply to Pierre-Eric Pelloux-Prayer from comment #22)
> > 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.

Yes both Rocket League and Desktop hangs seem to be the sdma0 type. I will add
that parameter as well and see if there is any difference with Rocket League
hang and use the desktop with both flags enabled.

Well I mean actually finding multiple bugs while debugging 1 can only be a good
thing, after all less bugs in the future and my personal computing seems to
have quite a few corner cases it seems that otherwise go unnoticed :D which
should benefit many new happy Navi users

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