[Bug 91880] Radeonsi on Grenada cards (r9 390) exceptionally unstable and poorly performing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91880

--- Comment #148 from alvarex <edisonalvarez at arnet.com.ar> ---
(In reply to Chris Waters from comment #133)
> I decided to record how my system behaves when using Linux and my 390
> together.
> 
> This is what I see https://www.youtube.com/watch?v=9uVIzHFlTZk
> 
> This is Ubuntu MATE 16.10 with Firefox open¹, something that is not at all
> graphically intensive. On KDE Plasma 5 it's even worse, my entire system
> will sometimes crash. It's completely unusable and I'm stuck on Windows
> because of this.
> 
> ¹ I know there is a tab that says "Chrome Experiments", but it's unloaded. I
> tried loading one to see what would happen if I tried something a bit
> intensive, but my entire system crashed. Ended up having to restart
> recovered my session in Firefox.
> 
> This look the same for other 390 users?

thanks for the video maybe I should open another bug, I have the same artifacts
with a rx460. It happens randomly when resuming from standby, similar symptoms
as described in this bug. I will try patching the kernel and disabling some dpm
features as suggested, I'm not sure if it started happening with 4.9 or 4.10.
Setting power_dpm_force_performance_level to manual or high doesn't work.

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