The miPointerSpriteFunc swcursor code expects there to only be a single
framebuffer and when the cursor moves it will undo the damage of the
previous draw, potentially overwriting what ever is there in a new
framebuffer installed after a flip.
This leads to all kind of artifacts, so we need to disable pageflipping
when a swcursor is used.
The code for this has shamelessly been copied from the xf86-video-amdgpu
code.
Fixes: https://gitlab.freedesktop.org/xorg/xserver/issues/828
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
(cherry picked from commit 0aaac8d783)
Signed-off-by: Łukasz Spintzyk <lukasz.spintzyk@displaylink.com>
b8b10e2930