Is there a way to turn off CEC on the roku ultra? I've tried turning off the 1-touch setting but the roku is still fighting for control of my onkyo receiver. When I turn on my TV the receiver comes on, turns off and on a couple of times and then automatically switches to the roku even though I have the input set to the cable box. If I disconnect the roku everything works fine.
In the Roku settings menu you'll find a setting for One-touch play. That is what enables CEC. Turn it off and CEC shouldn't do anything any longer.
Oh wait, you already did that. To my knowledge that's the only CEC setting in the Roku. With my Sharp Roku TV, I do see one more CEC setting, labeled System Standby. But I don't know if all Roku devices have that setting.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.
Yeah it seems to work fine between my Samsung TV and my Denon receiver (I returned the Onkyo piece of junk) but the Roku seemed to keep muscling in and interfering. That's where I placed the device to cut out the CEC signals from the Roku.