Blank screen on new LG TV UQ70 worked on older LG

    Code
    Feb 16 18:10:56.923038 LibreELEC kernel: Kernel command line: coherent_pool=1M 8250.nr_uarts=0 snd_bcm2835.enable_headphones=0 snd_bcm2835.enable_hdmi=0  smsc95xx.macaddr=DC:A6:32:94:E2:98 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000  boot=UUID=1507-5354 disk=UUID=077f401e-ddf6-42b9-95f9-dfb3c6c109f1 video=HDMI-A-1:1920x1080M@60D
Feb 16 18:10:56.923082 LibreELEC kernel: Unknown kernel command line parameters "boot=UUID=1507-5354 disk=UUID=077f401e-ddf6-42b9-95f9-dfb3c6c109f1", will be passed to user space.

    Have a look at cmdline.txt again (especially the separator before "boot=...").

    The content of this file has to be one line. Options are only separated by one space sign. No newline, tab etc.

    Quote from Da Flex
    Code
    Feb 16 18:10:56.923038 LibreELEC kernel: Kernel command line: coherent_pool=1M 8250.nr_uarts=0 snd_bcm2835.enable_headphones=0 snd_bcm2835.enable_hdmi=0  smsc95xx.macaddr=DC:A6:32:94:E2:98 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000  boot=UUID=1507-5354 disk=UUID=077f401e-ddf6-42b9-95f9-dfb3c6c109f1 video=HDMI-A-1:1920x1080M@60D
Feb 16 18:10:56.923082 LibreELEC kernel: Unknown kernel command line parameters "boot=UUID=1507-5354 disk=UUID=077f401e-ddf6-42b9-95f9-dfb3c6c109f1", will be passed to user space.

    Have a look at cmdline.txt again (especially the separator before "boot=...").

    The content of this file has to be one line. Options are only separated by one space sign. No newline, tab etc.

    I don't have any separator before boot in that file. Any extra space there would have to come from whatever concatenated that string before it.


    Pixie:/flash # cat cmdline.txt 
    boot=UUID=1507-5354 disk=UUID=077f401e-ddf6-42b9-95f9-dfb3c6c109f1 video=HDMI-A-1:1920x1080M@60D
    Pixie:/flash # 

    Edited 2 times, last by noname101: Merged a post created by noname101 into this post. (November 27, 2023 at 2:02 PM).

    Quote from popcornmix

    Can you just connect hdmi and power (no sdcard inserted) and check output on display.

    You should see a diagnostic screen. Report the output of the "display:" line.

    I booted with no sdcard. The netboot screen came up and said ESC for diagnostics. I hit ESC and the screen went blank.

    On a side not, I am clearly not a spammer and hopefully considered a good, if new, member of the community. Can I have my "Time to post" reduced so that I can more quickly respond to the help that I am getting? If not I understand just wanted to ask.

    Since I can only post very 40 min I am going to cram in as much as I can.


    Here is my log file hooked up to my new TV with no config changes


    http://ix.io/4MCz

    Then I made this change:

    LibreELEC:~ # cat /flash/cmdline.txt 
    boot=UUID=1507-5354 disk=UUID=077f401e-ddf6-42b9-95f9-dfb3c6c109f1 video=HDMI-A-1:1920x1080M@60D 
    LibreELEC:~ # 

    And this is the log for that boot.


    http://ix.io/4MCK

    Quote from noname101

    Here is my log file hooked up to my new TV with no config changes


    http://ix.io/4MCz

    Yes, it has the same error (post #21) with the original cmdline.txt. I'm starting to think that your hardware is defective. Please try Raspberry Pi OS on another microSD to rule that out. HDMI seems to be OK.

    I've changed your status to "member", so you can post faster now.

    Quote from Da Flex

    Yes, it has the same error (post #21) with the original cmdline.txt. I'm starting to think that your hardware is defective. Please try Raspberry Pi OS on another microSD to rule that out. HDMI seems to be OK.

    I've changed your status to "member", so you can post faster now.

    If it was defective why would it work on other monitors? It just happened to break when I moved to my new TV?

    Quote from popcornmix

    I said boot with just hdmi and power connected. No keyboard. Otherwise you won't get the diagnostic display.

    When I do this the TV just says "No Signal" I don't get a boot or a splash screen or anything.

    Edited 4 times, last by noname101: Merged a post created by noname101 into this post. (November 27, 2023 at 5:04 PM).

    Thanks. A quick comparison shows that you have an audio problem on Samsung TV, which doesn't exist on Dell:

    Code
    Feb 16 18:10:58.707366 LibreELEC Boot[471]: ### Setting up sound card ###
Feb 16 18:10:58.707369 LibreELEC Boot[470]: ### Setting up sound card ###
Feb 16 18:10:58.739933 LibreELEC pulseaudio[378]: W: [pulseaudio] main.c: Running in system mode, but --disallow-module-loading not set.
Feb 16 18:10:58.741242 LibreELEC pulseaudio[378]: W: [pulseaudio] main.c: Home directory of user 'root' is not '/var/run/pulse', ignoring.

    Do you use an AVR for audio?

    I mean I own one but it is not hooked up. I don't even think I have hooked up the optical cable from the TV to the RPi4. The only thing plugged into the RPi is power and the mini-hdmi to hdmi connector.

    so I don't know that means, except that it has to be a kodi setting, but If I do:

    systemctl stop kodi

    The boot splash comes back so it is can still connect to the TV

    but when I start it again:

    systemctl start kodi

    boom, back to blank screen.


    Can I try different resolution from the cmd line?

    Edited 5 times, last by noname101: Merged a post created by noname101 into this post. (November 27, 2023 at 5:53 PM).