I removed (and purged) the Proprietary ATI Driver (12.3) and installed the fglrx from the ubuntu repositories and - aparently - the issue is solved.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/971179 Title: ATI fglrx/xorg need to be reconfigured at every boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/971179/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs