I had the same trouble as previously noted with xbox in getting movies from the ipad to play via the components/rear aux on the rear screen. My car spent a whole day at the dealership with no luck, then they sent me to the salesmen who had no idea, then they suggested I call GMC at which point I wasted an hour on the phone with tech customer service who said "ipads must not be compatible with acadia". I should have read the forum first! I pressed the aux button on the remote and it plays great on rear screen. THANKS! It is a shame that no one at GMC or at the dealership knew the answer.