Could you please test if putting the following line in the Device section fixes the miscalculation?
Option "IgnoreEDID" -- ati radeon driver does not autodetect displaysize on Latitude D600, therefore uses wrong resolution https://bugs.launchpad.net/bugs/80940 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
