Is this a regression from 12.10? The modesetting code in the kernel got rewritten for 3.7, so testing with 3.5 from quantal might make it work. Also, try without the KVM box to see if it makes a difference.
What happens if you run 'xrandr --auto' from a terminal after attaching the external screen? ** Package changed: xorg (Ubuntu) => xserver-xorg-video-intel (Ubuntu) ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1083790 Title: Connecting external monitor shows incorrect resolution on external screen and correct resolution on laptop screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1083790/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs