After restoring xorg.conf to default (removing virtual resolution), X-Server / GDM works again.
Now changing resolution of the external display works without problems, even with System -> Preferences -> Appearance -> Visual Effects: normal. But the other problem remains, that xrandr does not work (nothing happens). I attach Xorg.0.log and Xorg.0.log.old agagin. ** Attachment added: "Xorg.0.log" http://launchpadlibrarian.net/28876782/Xorg.0.log -- [i855] screen corruption when switching resolution https://bugs.launchpad.net/bugs/391084 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
