[Bug 105425] 3D & games produce periodic GPU crashes (Radeon R7 370)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105425

--- Comment #16 from MirceaKitsune <sonichedgehog_hyperblast00 at yahoo.com> ---
I have moved on to testing the various kernel parameters available for my
driver and card. As was pointed out by malcolmlewis on the openSUSE forums,
they can be listed with the following commands:

modinfo amdgpu
systool -vm amdgpu

I tested nearly half of them today, almost none made any difference. There were
however a few settings that appeared to influence the frequency of the freeze.
The most notable one of all seems to be the following:

amdgpu.moverate=4

With no parameters changed, the freeze now occurs roughly once per 30 minutes
in Xonotic. With that move rate limited to 4MB/s however, I seemingly reduced
it to only 90 minutes! The FPS will constantly drop and recover, but that makes
sense as this setting explicitly limits the buffer migration rate.

I may test other variables in the days to come, but for now I'm hoping this
offers at least some clue to get things started. My feeling is that the video
card may be slowly loaded with information until something fills up, or perhaps
some events throw too much data in at once and it reaches a bottleneck?

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