Thank you for your comments and hints. I already tried to a "sudo dpkg-reconfigure xserver-xorg" and chose the default options. This hasn't worked for me. The live-cd failed to properly set up a X-Session, too... I haven't tried the "on-the-edge"-drivers yet. I will come back after checking them out. The "/etc/X11/xorg.conf"-file is attached below, for "/etc/X11/Xorg.0.log"-file please see the attached file above. As said before, downgrading the driver works for me.
** Attachment added: "xorg.conf" http://launchpadlibrarian.net/10462840/xorg.conf -- [gutsy] ati driver not working in gutsy https://bugs.launchpad.net/bugs/154528 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
