Ubuntu - Dual GPU Configuration - Black Screen with X

[thefearox]

Hey All!

I am looking for help configuring dual GPUs on Zorin (Ubuntu 20.04). I have followed quite a bit of documentation and have gotten close I just cant figure out the last part.

System:
I have a GTX 1060 that has 4 displays working and running on it
I have a Quadro 410 that is running, recognized by the system, with one DP monitor connected

Steps:
I started out creating a second X desktop configuration but quickly learned that wasnt going to work. My monitor would light up with a black background and an X cursor when I moved to it.

I deleted all of that and this post here was the most helpful after I added the kernel parameter

Manjaro Linux, trouble creating additional XScreen

Yet another update. Tried different options, including disabling 3 primary monitors and enabling 4th secondary one, where I tried to create an additional XScreen on primary monitors and and it doesn’t work. So far the only thing the utility successfully does is lighting up the monitor, yet failing to send a picture to it as well as creating an additional xscreen. Looks like we need something else for this to work. I appreciate your help anyway.

With it, when I reboot, all 5 screen light up as they are loading but upon boot only my 4 monitors actually work. Loading the NVIDIA X Server Settings again shows the 5 monitor but that it is disabled.

I have also been trying to piece together info from:

Dual GPU Configuration on Ubuntu 21.10

I had tried setting it to maximum before with no difference really; maybe a minor improvement but nothing crazy… does it need to be run as root to set preferred mode? You’d think nvidia-settings would ask/acquire permissions if needed or at least present an error; well, it does on console obviously but in the GUI just clicking something and having it do nothing is not a great UX/UI response, heh… I’ll double check the PCI speeds as well next time I boot over… any other suggestions on things to …

and

Problem installing NVIDIA driver on Red Hat 8.4

Yes, I have the mouse and I can use the menu with a right-click on the second desktop. But I don’t understand why there is no window manager. You said that Gnome-shell only supports one screen, but in the past, we already had used this kind of thing, and it worked very well in RedHat 5… Why now, with a new and modern version it wouldn’t work ?

If anyone has any additional help that would be fantastic!

nvidia-bug-report.log.gz (727.3 KB)

[generix]

https://forums.developer.nvidia.com/t/ubuntu-20-04-not-able-to-run-6-7-monitor-setup-with-one-x-screen/200904/2?u=generix

[thefearox]

THE MAN THE MYTH THE LEGEND GENERIX THEMSELVES!!! NO WAY!

Yup. You solved it. It was that last step that I was missing. Thank you so much it worked immediately.

For anyone else, here is the summary:

• delete xorg.conf
• set kernel parameter nvidia-drm.modeset=1
• check two nvidia providers are avalable
• run xrandr --setprovideroutputsource NVIDIA-G0 NVIDIA-0 && xrandr --auto

I also then installed arandr which allowed me a gui to manage where the monitor was located in my setup.

Thanks for the help generix. I have no idea how I missed that one singular post that had my answer (typical) lol.