I have an Xbox One connected via HDMI to an RCA RT2761HB 5.1 Receiver. When I select HDMI Auto and select any option other than "Stereo" the Xbox complains that the option is not supported. If I select "HDMI Manual" and chose "Dolby 5.1" or "Dolby 7.1" the audio does not process on all channels (I think I'm missing the center channel) and the audio receiver only allows switching between the PLII and Emulated modes. If I select "DTS" I get no audio at all.
This receiver worked fine with the xbox 360 and continues to work fine with other devices. This is not a set-top-box passthrough issue, this applies to all applications and games. I've tried selecting "Beta" mode in the TV set-up - this changes nothing.