Update: new xorg-ati drivers in edgers ppa. Problem solved (I can log in with mode setting enabled), video output and openGL apps work as they should. Check if the update is good for you all as well.
Update: new xorg-ati drivers in edgers ppa. Problem solved (I can log in with mode setting enabled), video output and openGL apps work as they should. Check if the update is good for you all as well.