RPi4 with LE 10.0.2 CEC not working if HDMI-2 connected to AVR for audio

  • I am running LE 10.0.2 on a RPi4 and come from LE 9.2 on which CEC was always working OK (Pi-HDMI-1 > AVR > TV)

    If I have the Pi connected as: Pi-HDMI-1 > TV-HDMI-2 for video and Pi-HDMI-2 > AVR for Audio. Unfortunately the RPi looses it's CEC capabilities.

    In some cases (but not entirely reproducable) if I reboot the Pi I get back the CEC capabilities.

    1. as soon as I start playing audio/video it looses the CEC capabilities.

    2. if I start playing audio/video with the AVR off it remains the CEC capabilities, but looses again when turning on the AVR

    If I disconnect the Pi-HDMI-2 cable and direct both video and audio via Pi-HDMI-1, all issues are gone with CEC.


    If the CEC capabilities are lost I get this info:

    If the CEC is working correctly I see below info:

    Any suggestions?

    (TV: LG GX6LA and AVR: Rotel RSP 1069 which is not capable of 4K video passthrough)