apparently SOLVED with this command sudo apt-get purge fglrx lightdm && sudo apt-get install lightdm ubuntu- desktop
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1035749 Title: graphical interface freeze when logging "Ubuntu" (Unity3D) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1035749/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs