https://bugs.freedesktop.org/show_bug.cgi?id=106175
--- Comment #10 from Mike Bendel mike@exophase.com --- I have the same issue. For me amdgpu.dc=0 does not really fix it either. I have a 3840x1600 monitor running at 75 Hz. This is the different behavior I noticed when toggling the DC setting:
amdgpu.dc=0
Moving windows smooth most of the time but cursor frequently skips frames
amdgpu.dc=1
There is stutter/tearing in the movement of windows but the cursor is completely smooth otherwise.
Running 4.16.2 kernel here with a Radeon Pro WX 7100.