video out of range

I’m using a usb monitor switcher which allows me to use two computers with one keyboard, mouse and monitor. When I switch from Suse 10.3 to another computer and switch back to Suse, I get a blank screen with the message “out of range”. I suspect it has something to do with the video card. Anyone have this problem or know of a solution?

Are both systems set to the same resolution / color depth / frequency?

Another option would be to set a vnc connection, no need to use a hub, but you lose video acceleration on the remote machine.