https://bugs.freedesktop.org/show_bug.cgi?id=106446
--- Comment #1 from Mike Bendel mike@exophase.com --- Something else that may be of note:
Setting amdgpu.dc to 0 sort of fixes the stutter and general performance issues I'm seeing. Also there is no flickering/artifacts after a fresh boot, without touching the performance level setting. It isn't 100% though, after some time the desktop will start stuttering again when moving windows around. But right after a fresh boot, or switching resolutions, it is completely smooth, as it should be. In this mode however I notice the cursor skips frames. With amdgpu.dc=1 the cursor never skips frames.
All in all, neither mode is usable for me and I've resorted to using HDMI on my monitor which locks the refresh at 60 Hz.