I have been trying to configure my RPi4 (LibreELEC 9.2.0, KODI 18.5), to be alway on.
Whenever the AVR/Amplifier is switched off or the HDMI cable is disconnected the RPi4 freezes. The network interface still shows polling but I can not SSH into the Rpi until it is power cycled.
As expected, switching on the AVR again shows "No Signal" from the Rpi.
Other OS installs (DietPi; Raspbian Buster + KODI) remain ON and do not freeze.
I searched forums for a couple of weeks looking for a solution.
I have tried modifying config.txt
I have tried disabling CEC in KODI settings.
None of these changes have been sucessful. (perhaps an EDID emulator would work but it's an expensive solution)