Wow, this is really interesting, as I am having exactly the opposite issue with my Onkyo 507. If I got this right, when the OP uses HDMI from the HR 22 to the A/V receiver, he does not see DD 5.1 on the receivers screen. If he does HDMI to the TV and digital optical (or digital coax) to the A/V receiver he does see DD 5.1 on the receivers screen. If I hook HDMI up the first method, HR22 and Blu Ray to A/V and HDMI to TV, I get DD 5.1 on my receivers screen. I get no sound to the TV speakers (and that is a problem to my wife but not me) but full surround sound through my Polk RM10's. Trying to correct the TV speaker issue, I changed to the second method, HDMI to TV and optical to A/V receiver. I get sound to the TV speakers now, but my A/V receiver only shows PCM. I can adjust it to Neo6, but that isn't a real surround mode. I have no DD 5.1 with this hook up method. Interesting that we can have exact opposite results!!!!!!