I am using a ROKU 2, with latest update to software.
If the Roku goes via HDMI into my Samsung TV, all is well. If I route the Roku HDMI into my Denon AVR for surround sound (which is itself connected to the TV via ARC HDMI) I can get 5.1 sound from the Roku.
However, when I introduce an HDMI splitter box (which has worked well with everything else), so that one channel is going to the Denon AVR and one channel directly into a spare HDMI channel on the TV, (to view stuff that does not need 5.1) things go wrong.
Using the splitter, I can still get 5.1 when viewing via the Denon, but when trying to switch back to the HDMI going from the splitter to the TV, I get the purple screen of death and HDCP message! But if I then take away the splitter, and route the Roku back directly into the TV, it plays again.
I really cannot see why the Roku should behave in this manner? Or, more importantly, how to fix it?