Are any logs needed? I am using a rx570 on a LG 27UD59-B and it keeps waking
itself up when it tries to sleep. amdgpu.dc=0 does fix it but then I get mouse
lag when I move my mouse quickly for long strokes.

This bug I feel is very important, not having basic sleep functionality is
really annoying. This did not happen to me when I used my nvidia 1060 3gb with
the proprietary driver.