https://bugs.freedesktop.org/show_bug.cgi?id=106175
--- Comment #3 from tempel.julian@gmail.com --- Yes, then it also occurs with the monitor's resolution/refreshrate provided by its own edid (2560x1440 59.95Hz). Sorry, should have mentioned that.
Without compositor, moving of windows looks smooth. I also tried all vsync settings provided by Compton, but all show the stuttery behavior with amdgpu.dc.