i have two computers with a kvm switch, but it only uses rgb not dvi. i don't want to buy a dvi switch if i don't have to. if i plug one computer into the monitor's dvi port, and plug the other computer into the kvm switch and then into the monitor's rgb port, what would happen? there will be times when only the dvi signal is sent, which should be fine. but there will be times when both signals are being sent from different computers; what would the monitor display?
It depends on the monitor. I had Sony a few years ago and it had a switch at the back where you can toggle to which source signal you want to use. Now I have Samsungs and they have a button on the front labeled Source (on the other model it is labeled Exit) and each time I press it, the monitor switches from one signal to the other. Hope this helps.