[RPi4] HDMI CEC was working, stopped - what to check?

    I have LE 10.0.0 working on a Rpi4 2GB with a Samsung NU8000 for over a year. Control via CEC always worked, until this morning.

    - RC works in TV UI

    - I can control Kodi just fine with other means

    - HDMI cable is plugged into the port next to the power plug, hasn't been moved, unplugged, anything physical

    - no update of either LE nor the TV FW took place (auto-update is disabled on both)

    - replugging, rebooting, using the other micro HDMI port, nothing helps

    - LE update to 10.0.1 doesn't fix

    - resetting CEC to default doesn't fix

    What else can I do? Thanks!

    EDIT: it just started working again on its own. Can anyone explain how is that even possible?

    Edited once, last by Stooovie (November 5, 2021 at 9:14 AM).

    Quote from Stooovie

    EDIT: it just started working again on its own. Can anyone explain how is that even possible?

    I'd guess problem was TV end getting confused.

    It is quite common for CEC issues to be resolved by unplugging all HDMI from TV, and unplugging it from mains.

    We don't have an explanation of why that works so often - we just know it does.