HDMI-CEC Problems Odroid C4 / N2 / N2+

[Portisch]

So it looks like not a CoreELEC/device issue
More a issue of bad CEC implementation on your receiver or TV. I guess the receiver. Try to use ARC and connect the device directly to TV. Or try another libCEC version:

How to configure used libCEC version

As CEC is implemented different on each hardware (TV brand/type) it may is needed to switch the used libCEC version to get a stable CEC handling for your CoreELEC device. Maybe a older libCEC version is working better with older TVs or vice versa. Any error found by libCEC can be reported at the developer site from Pulse-Eight: Different libCEC versions can be chosen by open a SSH connection to a CoreELEC device. By default libCEC version 4.0.4 is used. Revert any changes done to the use…