I copied this post from another thread hoping someone might have some insight into this problem.

I have just connected my Motorola 6412 and Denon 2910 to a gefen HDMI switch. I can switch back and forth between the two just fine. My problem begins when I leave the switch on the DVD for a long period ie. watching a movie. When I switch back to the 6412 cable box the cable box settings have changed from 1080i to 720p and the screen size shrinks. Once I change the settings back to 1080i everything is fine again until I watch a movie.
I have sent Motorola a email but their person replying really didn't understand my question. I will call them next and see what they say. I know my cable provider will have no clue!