[RPi5] How to set RGB Full in LE12?

agabrean · June 10, 2024 at 9:16 AM

Hi,

It's been a week now that I search the forum and the web for a solution to my problem. I have a new LG OLED TV and a new RPI5 on which I have installed LE12. I need to set it to full RGB in order to get the perfect image quality (on my old NUC i3 11 with LE10, I managed to have FULL RGB and I can compare). I have deactivated "limited" in kodi - system - display, I have tried "boot=UUID=2504-0815 disk=UUID=9f7b1397-4586-452d-a897-b3f9f95035f5 quiet console=ttyAMA10,115200 console=tty0 video=HDMI-A-1:full_rgb" in /flash/cmdline.txt, I have also tried "modetest -M vc4 -w "39:Broadcast RGB:1"" in autostart.sh, nothing works.

Can anybody please help me, point me in the right direction?

Thank you,

Adrian

**Da Flex** · June 10, 2024 at 2:42 PM

Try this on SSH (it's from popcornmix) :

Code

systemctl stop kodi
modetest -M vc4 -w 32:"Broadcast RGB":1
systemctl start kodi

**chewitt** · June 10, 2024 at 5:17 PM

Code

echo 'modetest -M vc4 -w "32:Broadcast RGB:1"' > /storage/.config/autostart.sh
reboot

^ this will be persistent

agabrean · June 10, 2024 at 5:34 PM

It's working !!!!

Thank you guys very very much. I was so close, I just missed the right ID for the HDMI port. I misintepreted modetest output, the id was 32 subid 39, I used 39 instead of 32.

Thank you again

Adrian

maxi · November 30, 2024 at 4:39 PM

Quote from chewitt
Code
echo 'modetest -M vc4 -w "32:Broadcast RGB:1"' > /storage/.config/autostart.sh
reboot
^ this will be persistent

Hi,

With 13.0-nightly it does not assume anything after command, TV it remains limited instead of being full RGB.

Does the command have to be different or is it not possible?

Thanks.

**HiassofT** · November 30, 2024 at 5:49 PM

The internal id changed from 32 to 33 (the IDs are not guaranteed to be stable).

Either adjust the modetest line or use kmstest instead where you can specify the connector by name:

Code

kmstest -c HDMI-A-1 -P "Broadcast RGB=1" < /dev/null

so long,

Hias

[RPi5] How to set RGB Full in LE12?

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