[PROBLEM] Samsung CEC

[mk01]

@zilexa

just checked detailed specs of your denon and looks like we have winner. your denon is HDMI1.1 compatible. with HDMI1.1 CEC was only on paper and its implementation into products started only with HDMI1.3. also HDMI1.3a introduced real CEC "switches" and new rules about some CEC commands handling (incompatible with pre 1.3 standard).

CEC 1.3a specs documentation states at very beginning that pre-1.2 devices are 'obsolete', incompatible and it's use even as HDMI switches should be avoided. so you can buy a nice Yamaha, or connect RPI directly to TV and route audio to Denon via toslink.

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last idea what I have:

if Denon allows to disable its CEC, try it - maybe it wont be breaking the CEC traffic anymore.