Posts by jagberg

Quote from yullaw

HiassofT thanks for an idea. The result = the same issue as LE10.0.1, no CLI after edit.

Steps to replicate:

• fresh 2021-05-07-raspios-buster-armhf-lite.zip installation
• CLI with login reached
• sudo update
• sudo full-upgrade
• sudo rpi-update
• reboot
• CLI and login reached
• card removed and config.txt modified from dtoverlay=vc4-fkms-v3d to dtoverlay=vc4-kms-v3d
• card inserted back, booting with 4 raspberries appeared, then it goes to black screen
• on TV selected HDMI1 and then HDMI3 back -> CLI and login reached

See the outputs in the attachment

EDIT: attachment fixed

Quote from yullaw

HiassofT:
It seems I have found the working way for my case

Hardware:

• old LG 42LK450-ZB (2012) - edid 
• RPi 4B - original HDMI cable plugged to HDMI0 near to power supply

Software:

• fresh installed LibreELEC-RPi4.arm-10.0.1.img

Steps to replicate:

• after the first boot the blank screen only
• to reach the GUI select other HDMI source on TV via contoller and return back
• proceed the first LibreELEC setup and enable SSH
• connect to the RPi via SSH
  • mount -o remount,rw /flash
  • nano /flash/distroconfig.txt and just add (see PHASE 1 below):
    • hdmi_group=1
    • hdmi_mode=20
  • nano /flash/cmdline.txt and just add video=HDMI-A-1:1320x768@60D(see PHASE 2 below):
  • reboot

PHASE 1: Rainbow cube and boot process:

- The hdmi_group= and hdmi_mode= still affects the resolution and text size, which is hidden/not visible (black screen) in LibreELEC. The commands help to switch to PHASE 2 -> LibreELEC logo

The effect can be seen in RaspiOS (2021-10-30-raspios-bullseye-armhf-lite.zip), when e.g. hdmi_mode=1 is set.

Crossing from PHASE 1 to PHASE 2: black screen for 1s

PHASE 2: LibreELEC logo:

- The command video=HDMI-A-1:1320x768@60D or EDID (see the comment from Cris_) only affects the resolution for the screen resolution of the screen with LibreELEC logo and GUI.

Also in RaspiOS the PHASE 2 when it continues to CLI the text size is affected after PHASE 1

Please note that this is only an user description of the problem and temporary solution.

EDIT: fix typo

Display More

Thanks for this. I had issues on my v9 of LibreELEC and had similar issues on 10.0.0.2 when connecting to my TV and the device restarting or not showing a picture. I went through these steps and my Phase 2 screen wasnt showing the correct resolution after changing it here. It was still stuck on that screen and only worked when I changed my TV to a different HDMI port and then went back to it after it started.

To make this work for me I did everything you did but changed the following from 1 to 0 in "/flash/distroconfig.txt". This also fixed my sound issue where the flipping HDMI to get it to load up still didnt allow sound to come through.

disable_fw_kms_setup=0

And I used the following:

hdmi_group=2
hdmi_mode=39

I was getting sound some of the time. I rebooted with a number of different options (no hdmi connected initially, connected all the time). Sometimes it would still work after a reboot.

I have a Panasonic ST60 TV and was using 1024x768 resolution since 1920 wasnt working.

hdmi_group=2
hdmi_mode=16

When I added the line below sound was working as expected:

hdmi_drive=2 

I had the same black screen issue on raspbian (raspberry pi 4) and change the resolution from 1920x1024 to 1024x768 and that worked. I changed the config.txt in libreelec (sd card) to include:

hdmi_group=2

hdmi_mode=16

hdmi_group=1 didnt help