I have the same model and this is still a problem in Karmic. For reference I solved it by using the attached xorg.conf.
** Attachment added: "xorg.conf" http://launchpadlibrarian.net/34908324/xorg.conf -- monitor not recognized results in low resolution https://bugs.launchpad.net/bugs/373627 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