[Tinwarble]

and using that (correct) EDID data, one can force OE to use that data on startup by following the instructions on the OE wiki: http://wiki.openelec.tv/index.php?title=...#tab=Intel

Not quite that easy, since you first have to create a custom EDID. You could possible, if you don't have issues when plugged directly into your TV, pull the EDID for your TV and combine the video portion with the audio portion of your AVR's EDID.

Or you could find someone with a similar setup and have them pull their EDID and compare it with yours and use something like Deltacast TV E-EDID Editor.

But that's beyond the scope of me explaining.