Also bug #42816 (https://launchpad.net/distros/ubuntu/+source/xserver-xorg-driver-ati/+bug/42816) seems similar to this one. It is the same behaviour but different hardware.
Also bug #42816 (https:/ /launchpad. net/distros/ ubuntu/ +source/ xserver- xorg-driver- ati/+bug/ 42816) seems similar to this one. It is the same behaviour but different hardware.