Custom EDID on dual-boot system - black screen on boot

tode · January 17, 2024 at 8:57 PM

Hi,

I have a dual-boot (Ubuntu + LibreElec 11.0.4) NUC8i5BEK system with Yamaha AV Receiver and Sony Full-HD TV.
When I boot I have all devices turned off: the NUC turn all on via USB-CEC adapter.
But i get (randomly) a blank screen; to see LE screen I need to reboot (via Kore).

So I think I need a custom EDID file to load on boot. I followed the official instructions at https://wiki.libreelec.tv/configuration/edid :

find connected device (card0-DP-1)
create edid.cpio file
save edid.cpio in /flash/

but then I need to load it via grub, configured in ubuntu partition.

This is my grub setup:

Code

menuentry "LibreELEC edid" {
   search --no-floppy --set=root --fs-uuid e2a66b6d-xxxx-2396c0db69b3
   linux /KERNEL boot=UUID=e2a66b6d-xxxx-2396c0db69b3 disk=UUID=3310112e-xxxx-571af07148af quiet initrd=/edid.cpio drm_kms_helper.edid_firmware=DP-1:edid/edid.bin video=DP-1:D
}

but the edid file is not loaded.
This is the dmesg log:

Code

# dmesg | grep edid
[    0.000000] Command line: BOOT_IMAGE=/KERNEL boot=UUID=e2a66b6d-8b16-44a0-b051-2396c0db69b3 disk=UUID=3310112e-be99-4319-81ac-571af07148af quiet initrd=/edid.cpio drm_kms_helper.edid_firmware=DP-1:edid/edid.bin video=DP-1:D
[    0.044097] Kernel command line: root=/dev/ram0 rdinit=/init usbcore.autosuspend=-1 BOOT_IMAGE=/KERNEL boot=UUID=e2a66b6d-8b16-44a0-b051-2396c0db69b3 disk=UUID=3310112e-be99-4319-81ac-571af07148af quiet initrd=/edid.cpio drm_kms_helper.edid_firmware=DP-1:edid/edid.bin video=DP-1:D
[    0.044174] [drm] drm_kms_helper.edid_firmware is deprecated, please use drm.edid_firmware instead.
[    0.645010] platform DP-1: Direct firmware load for edid/edid.bin failed with error -2
[    0.645033] [drm:edid_load] *ERROR* Requesting EDID firmware "edid/edid.bin" failed (err=-2)
[    0.868059] platform DP-1: Direct firmware load for edid/edid.bin failed with error -2
[    0.868079] [drm:edid_load] *ERROR* Requesting EDID firmware "edid/edid.bin" failed (err=-2)
[    0.949504] platform DP-1: Direct firmware load for edid/edid.bin failed with error -2
[    0.949525] [drm:edid_load] *ERROR* Requesting EDID firmware "edid/edid.bin" failed (err=-2)
[   13.499042] [drm] Got external EDID base block and 1 extension from "edid/edid.bin" for connector "DP-1"

Display More

Any help?

Thanks a lot,
tode

**mglae** · January 18, 2024 at 7:03 PM

Looks like the edid.cpio was created wrong. Post it or list it.

Use complete logs, not snippets.

tode · January 23, 2024 at 6:42 AM

Thanks mglae ,

in attach my complete dmesg and the edid.cpio I put in "/flash/" dir.

I also have the "edid.bin" file in "/storage/.config/firmware/edid/edid.bin": I think this is the one found at time 14.104286 in dmesg.

Code

# find / | grep edid.bin
/run/kernel-overlays/firmware/edid/edid.bin
/storage/cpio/lib/firmware/edid/edid.bin
/storage/.config/firmware/edid/edid.bin

The problem I have is occurring randomly: this boot I didn't have the black screen.

Thanks for help,
tode

**Da Flex** · January 23, 2024 at 2:29 PM

Please provide a full debug log.

How to post a log (wiki)

1. Enable debugging in Settings>System Settings>Logging
2. Restart Kodi
3. Replicate the problem
4. Generate a log URL (do not post/upload logs to the forum)

use "Settings > LibreELEC > System > Paste system logs" or run "pastekodi" over SSH, then post the URL link

**mglae** · January 23, 2024 at 4:38 PM

edid.cpio is using the wrong directory structure.

Create lib/firmware/edid/edid.bin instead of usr/lib/firmware/edid/edid.bin.

tode · January 23, 2024 at 7:31 PM

Hi,
thanks for help.

mglae : I rebuilt the "edit.cpio" archive (in attach) but the problem persists (see dmesg in attach)

Da Flex : the debug file is https://paste.libreelec.tv/mint-foal.log (with the new generated edid.cpio)

tode

**mglae** · January 24, 2024 at 3:44 PM

The initrd configuration is wrong in grub menuentry. Grub require an extra line with initrd edid.cpio.

tode · January 25, 2024 at 7:48 PM

I think is correct now

grub:

Code

menuentry "LibreELEC edid" {
   search --no-floppy --set=root --fs-uuid e2a66b6d-8b16-44a0-b051-2396c0db69b3
   linux /KERNEL boot=UUID=e2a66b6d-8b16-44a0-b051-2396c0db69b3 disk=UUID=3310112e-be99-4319-81ac-571af07148af quiet drm.edid_firmware=DP-1:edid/edid.bin video=DP-1:D
   initrd /edid.cpio 
}

dmesg:

Code

# dmesg | grep edid
[    0.000000] Command line: BOOT_IMAGE=/KERNEL boot=UUID=e2a66b6d-8b16-44a0-b051-2396c0db69b3 disk=UUID=3310112e-be99-4319-81ac-571af07148af quiet drm.edid_firmware=DP-1:edid/edid.bin video=DP-1:D
[    0.044354] Kernel command line: root=/dev/ram0 rdinit=/init usbcore.autosuspend=-1 BOOT_IMAGE=/KERNEL boot=UUID=e2a66b6d-8b16-44a0-b051-2396c0db69b3 disk=UUID=3310112e-be99-4319-81ac-571af07148af quiet drm.edid_firmware=DP-1:edid/edid.bin video=DP-1:D
[    0.635263] [drm] Got external EDID base block and 1 extension from "edid/edid.bin" for connector "DP-1"
[    0.843937] [drm] Got external EDID base block and 1 extension from "edid/edid.bin" for connector "DP-1"
[    0.891825] [drm] Got external EDID base block and 1 extension from "edid/edid.bin" for connector "DP-1"
[    7.939040] [drm] Got external EDID base block and 1 extension from "edid/edid.bin" for connector "DP-1"

Thank you mglae ,
I'm going to test it in few days and i'll give feedback,
tode

**Da Flex** · January 25, 2024 at 11:00 PM

Conversion from DisplayPort to HDMI is critical. Maybe unsolvable (LSPCON chip issue).

tode · February 4, 2024 at 8:18 PM

After a week I can say the problem of the black screen at boot is gone.
Thanks again for the support.

But now I have another problem...
Sometimes I get a readable screen but at a wrong resolution (see attachment).

It's not a big problem, can be fixed with a reboot.
I think is not related to EDID; can be fixed with an additional grub parameter?

tode

**Da Flex** · February 5, 2024 at 12:48 AM

activate log level 1 by creating an advancedsettings.xml file
reboot
when the error appears, upload the log (by GUI, or by pastekodi command on SSH), and post the resulting URL

tode · February 17, 2024 at 10:26 PM

OK,

I finally managed to see the low resolution screen with the logs enabled.

The log is https://paste.libreelec.tv/rational-crane.log

This is the xrandr output:

Code

# xrandr
Screen 0: minimum 8 x 8, current 1024 x 768, maximum 32767 x 32767
DP1 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 1330mm x 750mm
  1920x1080     60.00 +  50.00    59.94    30.00    24.00    29.97    23.98  
  1920x1080i    60.00    50.00    59.94  
  1600x900      60.00  
  1280x1024     60.02  
  1280x720      60.00    50.00    59.94  
  1024x768      60.00* 
  800x600       60.32  
  720x576       50.00  
  720x480       60.00    59.94  
  640x480       60.00    59.94  
DP2 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

Display More

The problem happens randomly, when I start Kodi with AV Receiver and TV off,
thanks for help,
tode

**Da Flex** · February 17, 2024 at 10:56 PM

Quote from tode

The problem happens randomly, when I start Kodi with AV Receiver and TV off,

So you don't have picture when you switch the TV on.

From LE side it seems to be connected:

Code

Connector 0 (95) DP-1 (connected)
  Encoder 0 (94) TMDS
    Crtc 0 (51) 1024x768@60.00 65.000 1024/24/136/160/- 768/3/6/29/- 60 (60.00)  
      Plane 0 (31) fb-id: 121 (crtcs: 0) 0,0 1024x768 -> 0,0 1024x768 (C8   RG16 XR24 XB24 AR24 AB24 XR30 XB30 XR4H XB4H YUYV YVYU UYVY VYUY NV12 XYUV)
        FB 121 1024x768 XR24

Maybe your TV doesn't switch to the DisplayPort signal. Can you test with a computer monitor?

TiffTaylor · February 24, 2024 at 11:30 AM

I seem to have the same issue, if I power my Pi4 with my AV amp off, I just get the Librelec name and version at the top left hand corner, I can connect via SAMBA so Kodi is running, if I reboot with AV amp & TV on it boots as per normal.

VLouis · February 24, 2024 at 1:13 PM

Quote from TiffTaylor

I seem to have the same issue, if I power my Pi4 with my AV amp off, I just get the Librelec name and version at the top left hand corner, I can connect via SAMBA so Kodi is running, if I reboot with AV amp & TV on it boots as per normal.

Hi, try this: Power-up all connected to the HDMI cable (AV amp. TV - to be all devices ready when the LE starting), then power-up the RPi. If all working, connect to SSH run "getedid create" command. This will dump the EDID data and will use it at the boot (instead to search for a display).

Custom EDID on dual-boot system - black screen on boot

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