LE 10 RPi2 nightly: no hdmi output

1st Official Post

    Hello,

    i have a projector with rpi2 and kodi (librelec).

    i am using the latest release of milhouse (LibreELEC Testbuilds for RaspberryPi (Kodi 19.0) #0717) without problems. the hdmi output works fine without problems on a computer also on the video projector.

    now i have installed a fresh installation on a new sd card with this testbuildLibreELEC-RPi2.arm-10.0-nightly-20210710-ded9079.img. when i connect the rpi2 with a computer monitor (1080p) the hdmi output works perfectly, but if i connect it with the beamer projector - i get no hdmi output.

    i had test some hdmi setting in the /flash/config.txt with hdmi_group=2 and so on, but nothing happens.

    I had test some older images, but the older images doesnt solve my problem.

    how can i solve that?

    Regards

    Can you connect with ssh when connected to the projector? If yes run "pastekodi" and "modetest | pastebinit" and post the URLs.

    There's currently a bug in the video driver, if the HDMI cable isn't plugged in or the driver doesn't detect a display then RPi2/3 lock up during boot - this can also be caused by a broken (or not fully wired) HDMI cable, so testing with a different HDMI cable would be worth a try, too.

    so long,

    Hias

    The log shows that the video driver read an invalid edid from your projector and therefore refused to output via HDMI.

    Did you have to use any hdmi_... config.txt settings with the older milhouse build?

    Can you run "pastekodi" on the milhouse build as well and also run "tvservice -d edid.bin" on it and upload the resulting edid.bin file?

    so long,

    Hias

    Here the result of LibreELEC (Milhouse): devel-20200718000045-#0717-g776b589 (RPi2.arm)

    pastekodi

    LibreELEC:~ # tvservice -d edid.bin

    Nothing written!

    LibreELEC:~ # tvservice -s

    state 0xa [HDMI CEA (16) RGB lim 16:9], 1920x1080 @ 60.00Hz, progressive

    With the milhouse build the firmware couldn't read the edid either but it seems it fell back to a safe 640x480 mode and also provided a 1920x1080 mode.

    Please test the latest nightly with a known good HDMI cable (eg the one you used with the monitor) and your projector.

    If that still doesn't work you can add the following parameters to cmdline.txt as a workaround, that should give you 1920x1080p60 output:

    Code
    drm.edid_firmware=HDMI-A-1:edid/1920x1080.bin video=HDMI-A-1:D

    so long,

    Hias

    Hi,

    thanks for your suggestion.

    Between my projector and the pi2 there is a hdmi-converter. i need that to grab the dts/dolby signal from the hdmi cable for a audio receiver.

    now i have found out this one:

    if i connect the rpi2 with the hdmi converter, then i get no video output after the start

    if i connect the rpi2 without the hdmi converter, then i get the video output after the start - if i change now the hdmi connection to the hdmi-converter then the video output works - until the restart of the rpi.

    Here the results of Pastekodi and Modetest (hdmi-converter was connected between rpi and projector)

    Thanks for the logs, it's good to know that it works fine with the projector connected directly to the RPi.

    Please do the following:

    Connect RPi directly to connector and boot up LE. Then ssh in and run "getedid create". Now shut down LE and add the HDMI converter / audio extractor back into the chain and boot up again.

    LE will now permanently use the (working) edid from your projector and everything should work fine.

    so long,

    Hias

    Hi,

    i have executed the getedid create command, here the output of the command

    LibreELEC:~ # getedid create

    successfully installed edid override for HDMI-A-1

    but if i reboot the pi with hdmi connector for a few seconds i get a black screen on the video, but no normal video output.

    here the latest

    pastekodi

    Ah, your cmdline.txt is wrong, you seem to have put "

    drm.edid_firmware=HDMI-A-1:edid/1920x1080.bin" on a new line - everything needs to be in a single line in that file. You can drop that and make sure that

    "drm.edid_firmware=HDMI-A-1:edid/edid-HDMI-A-1.bin video=HDMI-A-1:D" immediately follows after "quiet" (separated just by a blank).

    so long,

    Hias

    you are right. the cmdline.txt was wrong.

    i have -restarted the configuration procedure

    first i had deleted the wrong entries (this was the default entry for my rpi2)

    LibreELEC:~ # cat /flash/cmdline.txt

    boot=UUID=1107-2955 disk=UUID=27ea94ba-c897-4e07-942f-594aaf01c537 quiet

    then i had recreated the edid file

    LibreELEC:~ # getedid create

    successfully installed edid override for HDMI-A-1

    after that the cmdline was modified by the getedid command

    LibreELEC:~ # cat /flash/cmdline.txt

    boot=UUID=1107-2955 disk=UUID=27ea94ba-c897-4e07-942f-594aaf01c537 quiet drm.edid_firmware=HDMI-A-1:edid/edid-HDMI-A-1.bin video=HDMI-A-1:D

    LibreELEC:~ # ls -l /flash/edid.cpio

    -rwxr-xr-x 1 root root 1028 Jul 31 18:09 /flash/edid.cpio

    after that i had rebootet the rpi2 with the hdmi-converter - the video output works now. thank you for your support. ;)