Update to LibreELEC no HMDI out any more.

mrremo · October 19, 2016 at 6:49 AM

Hello
I just updated my NUC D34010WYK from OE via "manual update" to LE. Everything is working very well except at boot.
The NUC is connected by a mini HDMI to HDMI adapter to my Toshiba TV. I'm controlling everything by a Logitech Harmony Touch. If I switch on the NUC and the TV, the NUC starts up and the TV as well. Since the update, I can't see the BIOS splash screen / BIOS posts or either the Kodi Screen. If I reboot the NUC by pressing the power button (the TV is still on), it shows instantly the BIOS boot screen and everything is working well.
It looks like that the NUC not regognize the HDMI screen at the first boot, because the TV is not ready yet. If the TV is already running for a while, theres no problem to start up the HTPC. The starnge thing is, it happend only since the update. On OE, it was no problem. Anybody an idea?

Bios WYLPT10H.86A.0042
LibreELEC-Generic.x86_64-7.0.2

mrremo

**DaVu** · October 19, 2016 at 6:58 AM Official Post

That´s not a real problem. If it works before with OpenELEC it was kind of luck. Probably the boot process is a bit different now with LibreELEC, which might cause, that the HDMI handshake is done earlier with LibreELEC and the TV doesn´t provide the EDIDs yet. Therefore the NUC doesn´t get the EDID informations and you will get no screen.

To avoid that, you either have to turn on the TV before or dump the EDID like explained in this OpenELEC wiki:

Configuring a Custom xorg.conf - OpenELEC

Take a look at "Custom EDID" at the link above. After doing this you don´t have to wait anymore until your TV is up.

mrremo · October 19, 2016 at 7:52 AM

Quote from DaVu

That´s not a real problem. If it works before with OpenELEC it was kind of luck. Probably the boot process is a bit different now with LibreELEC, which might cause, that the HDMI handshake is done earlier with LibreELEC and the TV doesn´t provide the EDIDs yet. Therefore the NUC doesn´t get the EDID informations and you will get no screen.

To avoid that, you either have to turn on the TV before or dump the EDID like explained in this OpenELEC wiki:

Configuring a Custom xorg.conf - OpenELEC

Take a look at "Custom EDID" at the link above. After doing this you don´t have to wait anymore until your TV is up.

Thanks DaVu for the very fast and good explained answer. I will test it this evening and give a feedback!

mrremo · October 20, 2016 at 5:25 AM

So, finally I tried to create a Custom EDID. Unfortunately it ins't working. I removed all created files und tried a second time. Still no luck. The only difference to the HowTo which DaVu has posed is, that I have /flash/syslinux.cfg and not /flash/extlinux.conf as in the description. So I edit the APPEND line in this file.

As a second step created a xorg.conf file which is saved in configfiles folder. The xorg.conf files looks like:

Section "Device"
Identifier "Device0"
Driver "intel"
VendorName "INTEL Corporation"
Option "UseDisplayDevice" "DFP-0"
Option "ConnectedMonitor" "DFP-0"
Option "CustomEDID" "DFP-0:/storage/.config/firmware/edid/edid.bin"
Option "UseEDID" "true"
Option "IgnoreEDID" "false"
EndSection
.
.
.

Any other idea? Can I check somehow the used EDID when the NUC is up an running with no output? I would like to confirm that the custom EDID is loaded.

**DaVu** · October 20, 2016 at 5:27 AM Official Post

I hope there is something in the log. Could you provide it, please?

mrremo · October 20, 2016 at 5:30 AM

Quote from DaVu

I hope there is something in the log. Could you provide it, please?

Yes, I can. How should i do that? Should i post the whole log in here or just a download link?

**DaVu** · October 20, 2016 at 5:39 AM Official Post

enable debug logging in system settings
restart kodi
ssh in (username: root - password: libreelec)
and then:

Code

pastebinit /storage/.kodi/temp/kodi.log

and provide the URL you will get from this command.

If you aren´t able to ssh in, then still use pastebin.com, paste it there and get us the link to it.

For SSH access: Accessing LibreELEC - LibreELEC

mrremo · October 20, 2016 at 6:35 AM

Thanks for the explanation.
This is a pretty cool way to provide logs.

Log conditions:

-Custom EDID created
-NO custom xorg.conf (I removed that file again)
-NUC is booting but TV is not yet ready

Here is the Link to the debug logs.

**DaVu** · October 20, 2016 at 7:40 AM Official Post

Where did you place the edid.cpio file in the end?

If I see the xorg.conf you created it seems to be in /storage/.config/firmware/edid/edid.bin which is wrong as it needs to be in /flash in the end. See:

Quote

Remount the boot filesystem as RW, and move the cpio archive into place
mount -o remount,rw /flash
mv ../edid.cpio /flash/

You have to follow ALL the steps inside this how-to

And IIRC there is no xorg.conf needed.

mrremo · October 20, 2016 at 7:52 AM

I followed all the step. The edid.cpio file is saved in /flash.

LibreELEC:/flash # ls -la
total 210668
drwxr-xr-x 3 root root 16384 Jan 1 1970 .
drwxrwxr-x 15 root root 228 Jun 25 07:28 ..
drwxr-xr-x 3 root root 4096 Oct 14 2015 EFI
-rwxr-xr-x 1 root root 10711968 Jun 25 06:33 KERNEL
-rwxr-xr-x 1 root root 204787712 Jun 25 07:33 SYSTEM
-rwxr-xr-x 1 root root 1000 Oct 19 19:48 edid.cpio
-r-xr-xr-x 1 root root 122308 Oct 14 2015 ldlinux.c32
-r-xr-xr-x 1 root root 69632 Oct 14 2015 ldlinux.sys
-rwxr-xr-x 1 root root 178 Oct 19 19:59 syslinux.cfg

Yes, I think there is no xorg.conf needed. I just tried this as a other possible solution.
Did you found something in the log?

**DaVu** · October 20, 2016 at 7:58 AM Official Post

No...and if that doesn´t work, I´m unfortunately out of ideas.

could you please show us the content of the syslinux.cfg file:

Code

cat /flash/syslinux.cfg | pastebinit

and get us the URL you will receive

mrremo · October 20, 2016 at 8:11 AM

Here is the Link.
Does it make sense to reinstall LE? Because it was working on OE.

**DaVu** · October 20, 2016 at 8:38 AM Official Post

You could try ofc.

You are sure, that HDMI-A-1 is the connected HDMI?

mrremo · October 20, 2016 at 8:58 AM

Quote from DaVu

You could try ofc.

You are sure, that HDMI-A-1 is the connected HDMI?

What means "ofc"?

Yes, I am sure, HDMI-A-1 is the connected HDMI. Btw: There is a Mini-HDMI to HMDI adapter in between the NUC an th TV.

**DaVu** · October 20, 2016 at 9:15 AM Official Post

ofc = of course

the mini hdmi shouldn´t matter in that case.

Well, if the how to doesn´t work anymore, I can´t help much on how to dump the EDID. Probably one of the devs is able to tell more.

**chewitt** · October 21, 2016 at 5:02 AM Official Post

The xorg.conf you are/were using will only work on an nVidia GPU not Intel.

mrremo · October 21, 2016 at 5:17 AM

Quote from chewitt

The xorg.conf you are/were using will only work on an nVidia GPU not Intel.

The xorg.conf is almost the same as show in the wiki for Intel.
Configuring a Custom xorg.conf - OpenELEC
Could you tell me, whats wrong in my version of xorg.conf?

**chewitt** · October 21, 2016 at 5:21 AM Official Post

Code

Option      "UseDisplayDevice" "DFP-0"
  Option      "ConnectedMonitor" "DFP-0"
  Option      "CustomEDID" "DFP-0:/storage/.config/firmware/edid/edid.bin"
  Option      "UseEDID" "true"
  Option      "IgnoreEDID" "false"

those are all nVidia-specific instructions, xorg.conf files are nowhere near as standardised as you're assuming.