Just got a Samsung UN55F7100 and connected it to my Denon AVR 1913. All input devices routed through the Denon via HDMI, and one HDMI from Denon to the Samsung HDMI2(ARC). Same issue as above, plus a few other odd things. One reason I got the Samsung is so that I could use the Amazon Streaming, Netflix, etc. on the TV and use the ARC to run the audio thorugh my Denon. Spent a LOT of time running a new 1.4HDMI cable through cabinetry, walls, and brick to get this done. Enabled HDMI control on the Denon and Anynet on the Samsung.
1. Problem: Same issue people above mentioned - the Samsung would cause my Denon to revert to TV Audio a few seconds after turning on. Solution: None.
2. Problem: Volume control for the Samsun/Anynet would display, at the same time that the Denon volume control would display: Solution: While you can't turn off the volume display on the Samsung that I could find, you can turn off the Denon display. So that's what I did. Only annoying fact is that the volume number on the Anynet is different than what the Denon shows. And the response is a bit delayed.
3. Problem: While I can watch tv through the cable box/DVR, when I try to watch any programs that i have saved on the DVR, once I hit play the screen goes completely black. Nothing. Nothing will display, etc. Solution: None.
In the end, I just turned off Anynet because it irritated me so much. I got my old Apple TV out of the closet, hooked it up, and now I use that to stream Netflix, Amazon Prime, etc. via the Apple TV. Kind of sucks, as the Samsung seemed to have a lot of good apps/etc, and I spent a lot of time replacing the 1.3 HDMI (that was installed by professional installers) with the 1.4HDMI/ARC (that I did by myself and almost lost my mind).
I've updated the software on everything, but can't seem to get them to play nicely. If anyone finds a solution other than programming the Harmony One to send a delayed signal, please post. My wife doesn't like the Harmony for some reason, and my 3yr old loves it so much that we can't leave it laying around or it gets swiped.