I am experiencing the same issue. I've attempted reinstalling 13.1 several times and it has not fixed the issue. I have opened my own bug report here: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1273403
I am experiencing the same issue. I've attempted reinstalling 13.1 several times and it has not fixed the issue. I have opened my own bug report here: https:/ /bugs.launchpad .net/ubuntu/ +source/ xorg/+bug/ 1273403