Command to completely disable CEC in "config.ini"

[Portisch]

You also can try libCEC 4.0.5 as it’s working on start but break after a while. This will maybe caused by libCEC:

CEC with CoreELEC 9.2.2 breaks ARC?

And since 20200706 it’s possible to choose libCEC version for testing. Default is libCEC 4.0.4. By touch /storage/.config/libcec-4.0.5.conf after a reboot libCEC 4.0.5 will be used. When removing the touched file again 4.0.4 will be used. EDIT: since 20200715 there will be libCEC 4.0.7 available to by touch /storage/.config/libcec-4.0.7.conf