Have you filed the bug with (K)ubuntu? It would be good to know if they have patched with [0] as this was to solve bug with similar issue [1]
[0] https://cgit.freedesktop.org/xorg/driver/xf86-video-qxl/commit/ [1] https://bugzilla.redhat.com/show_bug.cgi?id=1428340
Have you filed the bug with (K)ubuntu? It would be good to know if they have patched with [0] as this was to solve bug with similar issue [1]
[0] https:/ /cgit.freedeskt op.org/ xorg/driver/ xf86-video- qxl/commit/ /bugzilla. redhat. com/show_ bug.cgi? id=1428340
[1] https:/