Updating to xserver-xorg-video-intel 2:2.11.0-1ubuntu1~xup from the Ubuntu-x-swat PPA does not resolve the bug.
Adding in xorg.conf Option "DRI" "false" seem to workaround the problem
Updating to xorg-video- intel 2:2.11. 0-1ubuntu1~ xup
xserver-
from the Ubuntu-x-swat PPA does not resolve the bug.
Adding in xorg.conf
Option "DRI" "false"
seem to workaround the problem