I think there is a connection with this bug report:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/109934
Maybe the problem has the same origin
I think there is a connection with this bug report:
https:/ /bugs.launchpad .net/ubuntu/ +source/ xserver- xorg-video- intel/+ bug/109934
Maybe the problem has the same origin