Unable to select HDMI-A-1 monitor as output + LibreELEC 11.0.1

ctktv · April 16, 2023 at 1:55 PM

Hi forum, I have recently installed the latest stable LE onto an external USB stick.

I can see, that both the LCD of the laptop and the Panasonic TV attached via the HDMI cable to the laptop, displays the boot splash screen.

After Kodi starts, the HDMI attached monitor goes blank, but not into standby/power-off mode. Audio selection via the HDMI works, but I am unable to select the HDMI screen as my default display screen.

After reading this thread: EDID NUC + LibreELEC 10.0.1 and then this document https://wiki.libreelec.tv/configuration/edid

I am unable to force the default kernel boot screen to be my external HDMI, it always defaults to the LCD screen. if I ssh into the system and stop the kodi.service I am able to see the boot splash screen again on both outputs.

Here are my details of my system:

Code

LibreELEC:~ # cat /etc/os-release
NAME="LibreELEC"
VERSION="11.0.1"
ID="libreelec"
VERSION_ID="11.0"
PRETTY_NAME="LibreELEC (official): 11.0.1"
HOME_URL="https://libreelec.tv"
BUG_REPORT_URL="https://github.com/LibreELEC/LibreELEC.tv"
BUILD_ID="aae861df88959402cde174cf95e505d942d8451e"
LIBREELEC_ARCH="Generic.x86_64"
LIBREELEC_BUILD="official"
LIBREELEC_PROJECT="Generic"
LIBREELEC_DEVICE="Generic"

LibreELEC:~ # tail /sys/class/drm/*/status
==> /sys/class/drm/card0-DP-1/status <==
disconnected

==> /sys/class/drm/card0-DP-2/status <==
disconnected

==> /sys/class/drm/card0-DP-3/status <==
disconnected

==> /sys/class/drm/card0-DP-4/status <==
disconnected

==> /sys/class/drm/card0-HDMI-A-1/status <==
connected

==> /sys/class/drm/card0-eDP-1/status <==
connected

Display More

if I run the manual commands as shown in the EDID article while Kodi is not running. I get no results, even though the edid.cpio and kernel command was appended successfully.

if I run the command, while Kodi is running, I do get results, but only for the card0-eDP-1 (LCD). The external HDMI goes blank, and no splash screen is shown. This works as expected when I set the LCD as the default output.

If I try to run the commands while Kodi is running, but for card0-HDMI-A-1, I get the same results as before I made any change, nothing. It defaults to LCD/card0-eDP-1 output. If I stop the kodi.service the boot splash screen displays on both outputs.

Code

LibreELEC:~ # lspci -nnv | grep -i "vga"
00:02.0 VGA compatible controller [0300]: Intel Corporation TigerLake-LP GT2 [Iris Xe Graphics] [8086:9a49] (rev 01) (prog-if 00 [VGA controller])

LibreELEC:~ # lscpu | grep -i model
Model name:                      11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz
BIOS Model name:                 11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz To Be Filled By O.E.M. CPU @ 3.0GHz
Model:                           14

Here is the link to lookup the hardware based on the hex number 9a49 https://dgpu-docs.intel.com/devices/hardware-table.html

Working LCD syslinux.cfg:

Code

LibreELEC:~ # cat /flash/syslinux.cfg
SAY Wait for run mode to start automatically in 5 seconds...
SAY
SAY Options
SAY =======
SAY installer: permanently install LibreELEC to HDD/SSD
SAY live: boot LibreELEC using RAM for temporary storage
SAY run: boot LibreELEC using this USB memory device for storage
SAY
DEFAULT run
TIMEOUT 30
PROMPT 1

LABEL installer
  KERNEL /KERNEL
  APPEND boot=UUID=1803-3210 installer quiet systemd.debug_shell vga=current initrd=/edid.cpio drm.edid_firmware=edid/edid.bin video=eDP-1:D

LABEL live
  KERNEL /KERNEL
  APPEND boot=UUID=1803-3210 live quiet vga=current initrd=/edid.cpio drm.edid_firmware=edid/edid.bin video=eDP-1:D

LABEL run
  KERNEL /KERNEL
  APPEND boot=UUID=1803-3210 disk=UUID=77112910-cced-45e6-add1-c060d09e8949 portable initrd=/edid.cpio drm.edid_firmware=edid/edid.bin video=eDP-1:D

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Not Working syslinux.cfg:

Code

LibreELEC:~ # cat /flash/syslinux.cfg
SAY Wait for run mode to start automatically in 5 seconds...
SAY
SAY Options
SAY =======
SAY installer: permanently install LibreELEC to HDD/SSD
SAY live: boot LibreELEC using RAM for temporary storage
SAY run: boot LibreELEC using this USB memory device for storage
SAY
DEFAULT run
TIMEOUT 30
PROMPT 1

LABEL installer
  KERNEL /KERNEL
  APPEND boot=UUID=1803-3210 installer quiet systemd.debug_shell vga=current initrd=/edid.cpio drm.edid_firmware=edid/edid.bin video=HDMI-A-1:D

LABEL live
  KERNEL /KERNEL
  APPEND boot=UUID=1803-3210 live quiet vga=current initrd=/edid.cpio drm.edid_firmware=edid/edid.bin video=HDMI-A-1:D

LABEL run
  KERNEL /KERNEL
  APPEND boot=UUID=1803-3210 disk=UUID=77112910-cced-45e6-add1-c060d09e8949 portable initrd=/edid.cpio drm.edid_firmware=edid/edid.bin video=HDMI-A-1:D

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Is the problem related to me being unable to disconnect the attached LCD while trying to read the EDID for the HDMI-A-1 output?

What could be the problem, any insight would be helpful.

ctktv · April 17, 2023 at 7:55 AM

I have followed this thread after posting mine and got a slight change, but not winning. Setting resolution on dual screen config

So it seems there is a way to run Kodi at least when in mirror mode, but when everything matches on both outputs. Turns out my HMDI runs at 50Hz (because of my country) and the LCD runs at 60Hz.

I fixed this with the following line

Shell session

tail /sys/class/drm/*/status

mkdir -p /storage/.config/firmware/edid
cat /sys/class/drm/card0-HDMI-A-1/edid > /storage/.config/firmware/edid/tv_edid.bin
cat /sys/class/drm/card0-eDP-1/edid > /storage/.config/firmware/edid/lcd_edid.bin

cd ~
mkdir -p cpio/lib/firmware/edid
cp .config/firmware/edid/* cpio/lib/firmware/edid/
cd cpio/
find . -print | cpio -ov -H newc > ../edid.cpio

mount -o remount,rw /flash
mv ../edid.cpio /flash/
nano /flash/syslinux.cfg

initrd=/edid.cpio drm.edid_firmware=HDMI-A-1:edid/tv_edid.bin,eDP-1:edid/lcd_edid.bin video=HDMI-A-1:1920x1080@60D video=eDP-1:1920x1080@60D

cd /lib/firmware/edid/
ln -s /storage/.config/firmware/edid/monitor_edid.bin tv_edid.bin
ln -s /storage/.config/firmware/edid/projo_edid.bin lcd_edid.bin

Display More

The TV reports 60Hz as well, and inside Kodi under display a new resolution has appeared, interlaced. I used to be able to see the following lines:

1920x1080p

1920x1080p <= why double, been like this the whole time (makes no difference)

1920x1080i <= new one

However, selecting any of the additional two resolutions, that appears to be the same, doesn't make it switch to the external HDMI.

**mglae** · April 17, 2023 at 4:27 PM

In the past the required kernel parameter combination was:

Code

video=HDMI-A-1:D video=eDP-1:d

cosmos · April 18, 2023 at 11:34 AM

Quote from ctktv

Shell session

[...]
ln -s /storage/.config/firmware/edid/monitor_edid.bin tv_edid.bin
ln -s /storage/.config/firmware/edid/projo_edid.bin lcd_edid.bin

Apologies for hijacking this thread a bit, but I had to ask: why do you symlink in the last two lines? Perhaps this is related to my odroid C2 issue in Odroid C2 on 11.0.1: switching tv to 24fps?