I have my mac mini plugged into my hdtv via hdmi running at 1360X768 screen resolution when i change the tvs input to my ps3 and then i go back to the mac input on my tv it has changed the brightness levels and picture goes funny to change it back to normall i have to change screen resolution to 1080i then switch back to 1360x768 how can i stop my mac mini from doing this?

I have my mac mini plugged into my hdtv via hdmi running at 1360X768 screen resolution when i change the tvs input to my ps3 and then i go back to the mac input on my tv it has changed the brightness levels and picture goes funny to change it back to normall i have to change screen resolution to 1080i then switch back to 1360x768 how can i stop my mac mini from doing this?

try default settings