It's not a bug it's a feature! :-( It sounds like you are experiencing upstream http://bugs.freedesktop.org/show_bug.cgi?id=23705 . To be honest, I also don't understand why the xserver needs to lie about the display size.
** Bug watch added: freedesktop.org Bugzilla #23705 https://bugs.freedesktop.org/show_bug.cgi?id=23705 -- wrong screen size detected on X200s https://bugs.launchpad.net/bugs/521877 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