I have the same issue but with intel graphics. One difference is that that the high load on Xorg goes away after about a minute and the system behaves normally.
I can also produce this high load using xmodmap -pke > .Xmodmap xmodmap ~/.Xmodmap -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/1395547 Title: xfsettingsd and xfce4-volumed using a lot of CPU after screen lock / unlock To manage notifications about this bug go to: https://bugs.launchpad.net/xfce4-settings/+bug/1395547/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp