Hmm....I've actually never tried that, and TBH I'm not sure if it's even possible. To get 3D working on the ps3 you have to do the "auto-detection" in the display settings, but if you go back to change it to "custom" and uncheck 1080i and 1080p, it might automatically disable 3d of all types. I have a two projector setup (one 1080p for 2d, one 720p for 3d), so I just have a standalone blu-ray 3d player (in addition to the ps3) with an optical cable going to the receiver. No 7.1 or uncompressed audio but what can you do lol. If you're only using one display, you might have to hook up the hdmi directly to the tv or projector, and then connect an optical to your receiver. You can try an hdmi splitter with one hdmi out going to the receiver and one going to the display, but those can be finicky. There are standalone blu-ray 3d players that have dual hdmi outs that work for this purpose as well. Anyway be sure to report back if disabling 1080p works!