Comment # 43
on bug 106175
from bmilreu@gmail.com
(In reply to Brandon Wright from comment #42) > This is pretty serious. Just moving the mouse cursor around while something > slightly GPU-heavy is running at 60hz can produce frame-skipping. > > I switched the display core off with amdgpu.dc=0 and everything got > significantly smoother and chromium doesn't chug on heavy pages any more. > > I'm using 4.19.x. I haven't tried the drm-next-4.21-wip tree yet. Dont need to try drm-next-4.21-wip, just did and it still has the issue If devs want an easy test case, use these links for reproducing it in chromium: https://www.vsynctester.com/ https://www.testufo.com/photo https://www.slither.io move the cursor around, move/resize some windows. you will notice it the vsync/cursor stutters and frame-skips are pretty noticeable with dc=1 on all three links KWin, compton, TearFree, mutter, xfwm4 all have the same problems.
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