https://bugs.freedesktop.org/show_bug.cgi?id=92996
--- Comment #12 from Michel Dänzer michel@daenzer.net --- The modesetting driver in xserver 1.17 didn't support page flipping yet. To avoid tearing, you need the modesetting driver from xserver 1.18 or current xf86-video-amdgpu with Fiji support (and enable Option "DRI3" to avoid tearing when moving around windows in gnome-shell).