A coworker of mine has a McBook Pro 13" that works fine until I connect it to a projector. I am using an Apple adapter to VGA for the projector. As soon as I plug it in, the laptop freezes completely and needs to be rebooted, even if I unplug the cable. No picture ever shows up on the projector.
I've used the same adapter and projector successfully several times with my own McBook Pro 15" and a couple of others, including a PC, so I don't think there's anything wrong with the adapter or cable or projector.
Any idea on what could be causing the freezing?