Comment 48 for bug 107320

Since this bug has been marked as a duplicate of bug 151311, see if my solution/work-around for 151311 helps. Note that if you are using a laptop screen, and xrandr reports other "connected" monitors, you propably want to ignore the other monitors in xorg.conf, and not LVDS, as in the the example....

https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/151311/comments/38