Posts by yullaw

  • LE 10.0.1 / Rpi4 / No picture after update from LE 10.0.0

    Quote from frakkin64

    I had similar problems testing 5.15.2 on LibreELEC 10, and one of my devices has problems with the current HEAD on libreelec-10.0 branch, also had similar problems with bullseye on a 3rd RPi4.

    Oddly, what I found solved it was enable_uart=1 in config.txt. There is a lot of miscellaneous reports on this issue, and some naturally have different causes, so there is a lot of noise out there on the Pi forums, the issue trackers, etc. I am told core_freq_min=500 should have the same effect, but I haven't tested that yet.

    EDIT: can confirm core_freq_min=500 also solves it, tested it on bullseye, basically without either I get crtc flip bit timeouts and black screen on GUI.

    enable_uart=1 or freq_min=500 brings good results for my LG TV and RPi4 with a fresh installed RaspiOS Bullseye and LibreELEC 10.0.1.

    No more additional commands such as video=HDMI-A-1:1320x768@60D are needed.

    What I can't confirm at this moment, if it will affect anything else.

    I will let you know

    Thank you

  • LE 10.0.1 / Rpi4 / No picture after update from LE 10.0.0

    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

  • LE 10.0.1 / Rpi4 / No picture after update from LE 10.0.0

    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

  • LE 10.0.1 / Rpi4 / No picture after update from LE 10.0.0

    HiassofT you are right that I have changed the resolution to 1360x768 afterward I reached the GUI. It was a test if the resolution was saved and known after the reboot.

    LibreELEC-RPi4.arm-10.0-devel-20211107115829-035c5c6.tar uploaded directly to the .update folder on the card. Then inserted and RPi4B turned on. Again the rainbow cube appeared, then black screen (TV doesn't appear "No signal" as always), on the TV I selected HDMI1 and back to HDMI3 and seen the extracting process with LibreELEC logo. Still the same issue.

    Output with drm.debug=0x04:

    Output with drm.debug=0x04 video=HDMI-A-1:1360x768M@60D after reboot:

  • LE 10.0.1 / Rpi4 / No picture after update from LE 10.0.0

    Hi dev team,

    Description of issue:

    Since a fresh LE 10.0.1 installation (LibreELEC-RPi4.arm-10.0.1.img) also I am facing the issue with a black screen after the rainbow cube, just I can hear the GUI sound.

    Not even adding the video=HDMI-A-1:1280x720M@60D or with different resolution, without "M"/"D" to cmdline.txt no luck.

    Other systems Raspbian OS, Retropie, Batocera or LibreELEC up to 10.0.0 no issue.

    Hardware:

    • old TV: LG 42LK450-ZB (2012), ports HDMI1-3, factory reset
    • RPi4B: connected with an original cable to port HDMI0, bootloader EEPROM 2021-04-29, FW 000138A1

    How to replicate:

    • fresh install LE10.0.1 via balenaEtcher
    • add ssh to cmdline.txt
    • launch the LibreELEC on RPi4B

    Temporary workaround:

    On the TV select other HDMI source and return back.

    In my case I select e.g. HDMI1 and then HDMI3 -> I get the GUI screen!

    NOTE:

    • by this way I also see the LE initial after the first boot
    • after the RPi4B reboot the black screen is back

    Hope it helps