[RPi5] CEC not working

    Hi,


    I'm Pierre, and I'm new to LibreElec, I have a raspberry PI 5 4Gb that I branched to my Philips TV using a HDMI cable (plugged on the HDMI port nearest to the USB-C port). I run LibreELEC (official): 12.0.2 (RPi5.aarch64) on it.

    I would like to control it using my TV remote control, but I can't get it running.

    • CEC is enabled
    • I tried rebooting (TV and raspberry)
    • I tried playing with the configuration (mainly HDMI number and type of device), and also went back to the default.
    • I tried different HDMI port on my TV
    • I tried both port on the raspberry
    • I tried to scan using "echo 'scan' | cec-client -s", but all failed


    Do you guys have any ideas of what I am doing wrong?


    Thank you!


    Pierre


    N.B. Also before trying LibreElec, I tried Kodi over a standard raspi OS, and CEC did work well, so it does not seems to be hardware releated issue.

  • Go to Best Answer

    Try the latest nightly from 2025-04-16, it solved a bunch of issues for me:
    Its at the bottom of the nightly page: https://test.libreelec.tv/12.0/RPi/RPi5/
    LibreELEC-RPi5.aarch64-12.0-nightly-20250416-e25b5e0.img.gz (sha256) 2025-04-16 15:44 143.5M

    I used the official hdmi-cable from RPI, so I could have 4K@60hz with my SamsungTV (2024).
    All works just fine here /shrug

    edit 1:

    I could reproduce some I think: I use the HDMI-0 (closest to power-port), when I use the other one HDMI-1 the CEC does not work.

    edit 2:

    I tried changing HDMI-port number from 1 to 2 , that did not work
    I tried changing physical address from 0 to 1 and 2 but that did not work either. (assuming those are addresses?)

    So I went to the pulse-eight website to get some clarification on the options: https://libcec.pulse-eight.com/FAQ/Index/104
    * HDMI port number: the HDMI port number that you connected the CEC adapter to on your TV or AVR. (Default: 1)
    * Connected to HDMI device: the logical address of the HDMI device that you connected the CEC adapter to. 0 for TV, 5 for an AVR (Default: 0)
    So a bit of a dead end there.


    Then I went to https://github.com/Pulse-Eight/libcec and under vendor specific notes:

    Raspberry Pi

    • If your TV cannot detect the Raspberry Pi's CEC, or if the the Pi can't detect the TV, try adding the following line in /boot/config.txt and reboot the Pi: hdmi_force_hotplug=1


    So that might be an option, but I cant test it because it works fine here on HDMI-0 just not HDMI-1


    Good luck !

    Edited 2 times, last by Elicity (June 19, 2025 at 9:03 AM).

    Quote from Elicity

    I could reproduce some I think: I use the HDMI-port closest to power-port, when I use the other one CEC does not work.

    That's intentional and expected. CEC is only supported on the HDMI-A-1 connector (nearest the USB-C power port).

    Okay, good to know. I'm no expert, I just used the descriptions from the board itself:

    So the HDMI-A-1 is the HDMI0 port on board ?

    Afaict setting the hotplug value might work for him.


    As a last resort I found in /flash/config.txt which could be related, but IDK.

    # Don't send initial active source message.
    # Avoids bringing CEC (enabled TV) out of standby and channel switch when
    # rebooting.
    hdmi_ignore_cec_init=1

    • Best Answer

    RPiOS and LE use identical firmware, config, and kernels. If it works in one it should work in the other.

    Have you tried hdmi_force_hotplug=1 ? - I'm not 100% sure this is still supported in Pi firmware but worth a shot.