[Bug 109955] amdgpu [RX Vega 64] system freeze while gaming

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109955

--- Comment #58 from Mauro Gaspari <ilvipero at gmx.com> ---
After a long time without crashes on Tumbleweed, I wanted to prepare a test
setup for valve mesa built with ACO. So I installed Ubuntu Budgie 18.04 LTS
with hardware enablement stack and I noticed the OS freezes are now back, even
on the RadeonVII. 

What I noticed in the game behavior is this. This is a game running on
crossover (wine) with DX11 and DXVK. I want to point out that I do alt-tab out
of games to do other things, so this might be a factor to consider. But again,
I do the same on my NVIDIA-GPU laptop and I never had a single freeze or fps
drop.
Not sure if point 2 and 3 are related, I just wanted to share my observations.

1. Game starts with excellent FPS. I can hear GPU fans spinning.
2. After a while, game loses a lot of FPS starts to become slow and sluggish,
GPU seems to be no longer doing much and I can no longer hear the fans
spinning.
3. After a while longer, the whole OS freezes as described in my first post.


What I am going to do next:
1. Use the workaround of comment #47 and test for a few days.
2. Install Valve mesa-aco with ubuntu PPA and test (without workarounds) for a
few days.

I will report back when I have more details on my tests.

System info:
OS: Ubuntu 18.04.2 LTS x86_64 
Kernel: 5.0.0-21-generic
Resolution: 3440x1440
CPU: AMD Ryzen 7 2700X (16) @ 3.700G 
GPU: AMD Vega 20 
Memory: 2650MiB / 64398MiB
OpenGL version string: 4.5 (Compatibility Profile) Mesa 19.0.2

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