Comment 1 for bug 751735

Before upgrading to Natty I had this issue, but only if I plugged HDMI cable in before the login screen would show up. Since I got Natty it now happens regardless of when I connect my laptop to the monitor (it also auto-configures and switches the output for external monitor only, maybe it's connected to the bug).

I have no idea how to triage this bug, or what information I could provide to help to fix it.