I spent some time trying to figure that same thing out. Unfortunately no luck. I have just turned on captions for some games (Dead Rising, Ryse) Not a perfect solution, but at least let's me continue to use the snap TV feature.
Pioneer Elite VSX-23TXH
Martin Logan Electromotion ESL front
Martin Logan Motion SLM surround and back
Martin Logan Dynamo 500
Polk Audio PSW505 (for a little extra boom)
Elite Screen 120"