Think I found the LG CEC issue but cannot resolve

cruse · 5 August 2022 12:23

Having CEC trouble (constant disconnects and ceasing to work) for a long time with CE 19 releases and my LG OLED TV, I researched and found a statement by Portisch to have a look at the libcec github.

There were other LG owners having trouble posting over there. Someone had a look into it and discovered that it is related to the fact that libcec is reporting with device type Recorder (type 1) in the default configuration which the LG does not seem to handle well. Changing to device type Playback resolved the issue for this user (type 4 is the suggestion).

libCEC continuously disconnects from LG OLED TV making CEC impossible to use · Issue #567 · Pulse-Eight/libcec · GitHub

So in our case I assume this is changed in

~/.kodi/userdata/peripheral_data/cec_CEC_Adapter.xml

parameter

<setting id="device_type" value="4" />

I can edit the file but do not know how to apply the change. Restarting Kodi (systemctl or reboot) overwrites the file with the old device type 1 setting. I assume this happens because the device type parameter is not accessible from within Kodi and not part of the Input Peripheral configuration.

Please have a look into this issue or advise what I could do on the command line to apply the configuration and make it persistent.

Thanks!

7Ji · 5 August 2022 12:47

You might need to stop Kodi before editting the file. Configs are cached in ram and is written on exit.
Stop Kodi

systemctl stop kodi

Edit the file
Bring Kodi back

systemctl start kodi

Reference: Cec_cec_adapter.xml is overridden on restart - Help and Support / Vero 4K / Vero 4K + - OSMC Forums

cruse · 5 August 2022 12:59

Thanks!

This is sticking and survives a systemctl restart kodi now.

Commencing my long term test whether this takes care of the LG issues.

Portisch · 6 August 2022 20:33

Nice to know, so this should be a user option in Kodi to adjust the device type!? Should be doable, I will see how to implement this. Type 4 is the playback device:

github.com

Pulse-Eight/libcec/blob/76551ea1dd9a55f0ce1533e440dc12dbc594f7ba/include/cectypes.h#L735


      
            CEC_USER_CONTROL_CODE_UNKNOWN                     = 0xFF
          } cec_user_control_code;
          
          
typedef enum cec_logical_address
          {
            CECDEVICE_UNKNOWN          = -1, //not a valid logical address
            CECDEVICE_TV               = 0,
            CECDEVICE_RECORDINGDEVICE1 = 1,
            CECDEVICE_RECORDINGDEVICE2 = 2,
            CECDEVICE_TUNER1           = 3,
            CECDEVICE_PLAYBACKDEVICE1  = 4,
            CECDEVICE_AUDIOSYSTEM      = 5,
            CECDEVICE_TUNER2           = 6,
            CECDEVICE_TUNER3           = 7,
            CECDEVICE_PLAYBACKDEVICE2  = 8,
            CECDEVICE_RECORDINGDEVICE3 = 9,
            CECDEVICE_TUNER4           = 10,
            CECDEVICE_PLAYBACKDEVICE3  = 11,
            CECDEVICE_RESERVED1        = 12,
            CECDEVICE_RESERVED2        = 13,
            CECDEVICE_FREEUSE          = 14,

Portisch · 8 August 2022 08:20

@cruse please test with this image. It will have the new option Represent type of device. You can there select the device type you need, default is the Recording Device. After changing this option a reboot is required. Please report back if the option is working, thx.

Test image including this new option:

Borec1 · 9 August 2022 11:45

can someone write if it helped? a few friends wrote to me that it doesn’t work like that on their LG televisions either. So I wonder if that solves the problem.

cruse · 10 August 2022 16:31

Thanks Portisch for implementing the parameter, but I’m sorry to report that the manual test with type 4 already failed as Borec1 hinted.

I’m pretty occupied at work with a software release and would only be able to test the weekend after the next one. Would appreciate it if someone else could test, but I would adjust expectations accordingly, seeing this already failed manually

It might have made it a bit better, as in longer CEC uptime but there sure must be other issues remaining as it doesn’t survive a whole day…

Muisje · 14 August 2022 14:33

I am having the same problems with newer builds of CoreElec on my LG. The only version currently which has stable CEC for me is 19.3 which I currently run. All newer version I have tested have CEC issues. Perhaps this piece of info helps.

Portisch · 2 September 2022 17:12

Try with nightly please

system · 2 December 2022 23:12

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