Ok, I'm attaching log files. There are some errors in kdm.log probably worth looking at.
** Attachment added: "kdm.log" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/767602/+attachment/2079021/+files/kdm.log -- 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/767602 Title: kdm black screen after logout _______________________________________________ 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