On 4.15-wip with patches that make powerplay work I have an issue with
one game = unreal tournament alpha.
This doesn't seem to affect other things like xonotic or unigine demos.
Issue = on fixes 4.14 and other older kernels I've tried, the game is OK
ish perf wise, 20-40 fps.
On 4.15-wip its 10fps. Using HUD one obvious difference is that the slow
case is only mostly using one cpu core, on a good kernel all 4 of my old
phenom 2 x4 are used.
Both kernels seem based on 4.13-rc5 so I guess it's something amdgpu.
Trouble is, I can't bisect 4.15-wip, going back near or > 200 commits I
lock soon after startx.
So is there any change devs can think of that would cause this?
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