[zeugma]

I looked at the Xorg command yesterday and get the following when I run it. I guess I could drop to runlevel 2 or 1, and try it again. It seems like it doesn't want X to be running already when you run it. Will try that tonight. (might try it in a VM first to check out behaviour)

NUC:~$ Xorg -configure 
(EE) 
Fatal server error:
(EE) Server is already active for display 0
        If this server is no longer running, remove /tmp/.X0-lock
        and start again.
(EE) 
(EE) 
Please consult the The X.Org Foundation support 
         at http://wiki.x.org
 for help. 
(EE) 

[greedo]

My minimal Ubuntu boots into the /dev/tty1 console on runlevel 5 (automatically as root with no password lol) and I use it to fsck/fdisk/mke2fs other partitions. Running startx gives me X and ratpoison. Anyway, I booted into the console and tried this:

Xorg :0 -configure

which ran and the last line in the log said

No devices to configure.  Configuration failed.

I searched around, and so far have not found anyone who got an xorg.conf successfully created with -configure.

If you actually get it to work, let us know how you did it.

[Hermes37]

You can force the EDID with a kernel command line in your grub configuration.

https://www.kernel.org/doc/html/v4.14/admin-guide/kernel-parameters.html

Scroll down to;
drm_kms_helper.edid_firmware=yadda yadda

Does your audio have any options relating to the HDMI and/or EDID? I have had similar issues with HDMI/DVI and having a KVM in the mix. Can be solved on the KVM config side.

Is your NUC the one with TOSLINK? Does your Yammy have an optical port?

Lots of ways to skin the feline.
I have not needed to edit an Xorg.conf in many years.

YMMV
:)