CEC issue

I have 1 RPi 4 and 1 RPi5. Currently I am running RPi5. But it's the same on both . The Pi is connected to AVR and the Output goes to my Hisense TV and a Beamer.

CEC is not working since the start. TV only recognizes the AVR. Can't navigate in Kodi with the TV RC.

The guys on the Kodi-Forum suggested to ask for help here. I found here that there is an interference because Kodi is using the CEC but don't know how to get around this. I need Kodi and it used to work for years flawlessly with my older Pi 3.

LibreELEC2:~ # echo 'scan' | cec-client -s -d 1
opening a connection to the CEC adapter...
ERROR:   [              21]     CLinuxCECAdapterCommunication::Open - ioctl CEC_                                             S_MODE failed - errno=16
ERROR:   [              21]     could not open a connection (try 1)
ERROR:   [            1021]     CLinuxCECAdapterCommunication::Open - ioctl CEC_                                             S_MODE failed - errno=16
ERROR:   [            1021]     could not open a connection (try 2)
ERROR:   [            2022]     CLinuxCECAdapterCommunication::Open - ioctl CEC_                                             S_MODE failed - errno=16
ERROR:   [            2022]     could not open a connection (try 3)
ERROR:   [            3022]     CLinuxCECAdapterCommunication::Open - ioctl CEC_                                             S_MODE failed - errno=16
ERROR:   [            3022]     could not open a connection (try 4)
ERROR:   [            4022]     CLinuxCECAdapterCommunication::Open - ioctl CEC_                                             S_MODE failed - errno=16
ERROR:   [            4022]     could not open a connection (try 5)
ERROR:   [            5022]     CLinuxCECAdapterCommunication::Open - ioctl CEC_                                             S_MODE failed - errno=16
ERROR:   [            5022]     could not open a connection (try 6)
ERROR:   [            6022]     CLinuxCECAdapterCommunication::Open - ioctl CEC_                                             S_MODE failed - errno=16
ERROR:   [            6022]     could not open a connection (try 7)
ERROR:   [            7022]     CLinuxCECAdapterCommunication::Open - ioctl CEC_                                             S_MODE failed - errno=16
ERROR:   [            7022]     could not open a connection (try 8)
ERROR:   [            8022]     CLinuxCECAdapterCommunication::Open - ioctl CEC_S_MODE failed - errno=16
ERROR:   [            8022]     could not open a connection (try 9)
ERROR:   [            9023]     CLinuxCECAdapterCommunication::Open - ioctl CEC_S_MODE failed - errno=16
ERROR:   [            9023]     could not open a connection (try 10)
unable to open the device on port Linux
ERROR:   [           10023]     could not start CEC communications

Here's a startup log

hastebin

LibreELEC2:~ # cec-ctl -S
Driver Info:
        Driver Name                : vc4_hdmi
        Adapter Name               : vc4-hdmi-0
        Capabilities               : 0x0000010e
                Logical Addresses
                Transmit
                Passthrough
                Connector Info
        Driver version             : 6.1.68
        Available Logical Addresses: 1
        DRM Connector Info         : card 1, connector 32
        Physical Address           : f.f.f.f
        Logical Address Mask       : 0x0000
        CEC Version                : 1.4
        Vendor ID                  : 0x001582 (Pulse-Eight)
        OSD Name                   : ''
        Logical Addresses          : 1 (Allow Fallback to Unregistered)

          Logical Address          : Not Allocated
            Primary Device Type    : Playback
            Logical Address Type   : Playback
            All Device Types       : Playback
            RC TV Profile          : None
            Device Features        :
                None


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