Comment # 10 on bug 106175 from Mike Bendel

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.