https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1492580
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1507289
https://bugs.launchpad.net/linuxmint/+bug/1389655
https://bugs.freedesktop.org/show_bug.cgi?id=89686
https:/ /bugs.launchpad .net/ubuntu/ +source/ xserver- xorg-video- ati/+bug/ 1492580
https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/1507289
https:/ /bugs.launchpad .net/linuxmint/ +bug/1389655
https:/ /bugs.freedeskt op.org/ show_bug. cgi?id= 89686