Just in case someone hits this bug.
There exists a patch solving the issue for most modern SiS and XGI chips, and the bug is fixed for Ubuntu Trusty. See the discussion here: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-sis/+bug/1066464.
Just in case someone hits this bug.
There exists a patch solving the issue for most modern SiS and XGI chips, and the bug is fixed for Ubuntu Trusty. See the discussion here: https:/ /bugs.launchpad .net/ubuntu/ +source/ xserver- xorg-video- sis/+bug/ 1066464.