With your post here http://forum.ubuntuusers.de/topic/146087/ I really think this is a duplicate.
Try: Alex Willmer wrote on 2007-10-02: (permalink) Commenting the line "virtual 1920 1440" and adding "1280x800" to the list of modes has resolved this problem for me. (with your video mode, in the xorg.conf file) -- Videomode not supportet https://bugs.launchpad.net/bugs/173578 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