I have a fresh install of Xubuntu 12.04 on a Dell Latitude D610 with an external AOC monitor connected. When I go into Settings->Display the external monitor is seemingly identified, but it remains black. Turning off the laptop monitor (in settings->display) gets me two black screens.
Does anyone know if there's a problem with this setup? Some other way to configure it in Xubuntu? Ideally I'd be able to like to use both monitors, but I'd also be happy to be able to get the external monitor working instead of the laptop's screen.
The Latitude has an ATI RV370 (Mobility Radeon X300).