Sven, please re-run dpkg-reconfigure after exiting your session, and stopping the gdm service. (sudo invoke-rc.d gdm stop)
This step is supposed to fix your setup. If it doesn't, please follow the steps described at https://help.ubuntu.com/community/DebuggingXAutoconfiguration, and attach the output of the requested files in this bug report. Thank you in advance for the feedback! -- Monitor misdetected (ThinkPad X41 Tablet) https://launchpad.net/bugs/42652 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs