dear lazyweb

[zwol]

For ages and ages I have thought that my laptop (or rather, the X server) was not on speaking terms with its external monitor socket. However, today I discovered that if I plug the monitor cable in before I turn the laptop on, it works... well, I get nothing on the laptop's own screen, and the display switch hotkey doesn't do anything, but I can live with that. The real problem, though, is that the X server insists on driving the external display at the laptop's screen resolution, which is Wrong. Today's projector valiantly displayed the middle however many pixels of the image, so of course my presentation got cut off at the sides in full screen mode.

How exactly do I kick the thing into resizing its screen down to the appropriate size for the projector?