Just in case anybody missed https://launchpad.net/distros/ubuntu/+source/xserver-xorg-driver-ati/+bug/34435 , adding this to the ati driver section in xorg.conf helps (for me):
Option "XAANoOffscreenPixmaps"
Just in case anybody missed /launchpad. net/distros/ ubuntu/ +source/ xserver- xorg-driver- ati/+bug/ 34435 , adding this to the ati driver section in xorg.conf helps (for me):
https:/
Option "XAANoOffscreen Pixmaps"