Nvidia driver prevents proper boot.

Hi
You really should start a new thread since your on a different GPU, sounds like you need to have a read here and build via the rpm method and run the script withthe GDM fix, else ensure autologin is disabled.
https://en.opensuse.org/SDB:AMD_fglrx

And hence ignore a search result of 298.000.000 hits on “why not login as root”. You, with your years of experience, should know better.
Never ever login as root on a desktop environment. Never.

Thank you immensely! It that essentially equivalent from explicitly having journatlctl spit out just Xorg logs?

Is this filtered log of any use for troubleshooting?

What gets me is that I know Gnome (and rather recent versions of it) work with my gpu, as I’ve had it running before on other distros that use Gnome. So there must certainly be a solution to this issue?

Yes.

Is this filtered log of any use for troubleshooting?

No.
It shows nouveau being used and nvidia not even installed.

Can you please post the log after installing the nvidia driver?
The log should also be in /var/log/gdm/ I think, or you could also temporarily switch back to xdm in /etc/sysconfig/displaymanager.
In that case, you probably have to set the X session to start too in /etc/sysconfig/windowmanager (DEFAULT_WM=“icewm” e.g.).

What gets me is that I know Gnome (and rather recent versions of it) work with my gpu, as I’ve had it running before on other distros that use Gnome. So there must certainly be a solution to this issue?

Of course they work.
But GNOME requires working OpenGL support (I think that’s what Carlos wanted to say). If OpenGL is broken (e.g. because you installed a proprietary driver but it doesn’t work/isn’t used), GNOME refuses to start (and if Mesa’s software renderer is in use, it will be quite slow…).

It will work with the GPU if using a proper driver and proprietary driver is NOT installed since the proprietary modifies the mesa files and if the proprietary driver is not run those modes break other drivers from using openGL. The question is is why is the proprietary driver not working thus causing gnome not to run. Only a proper log tells. I suspect something odd with this MB since you can not turn off the Intel GPU. This is acting more like a Optimus notebook rather then a desktop computer. The log shows that there were two monitors hooked to the NVIIDA card detected but it also looked like there may have been a third monitor detected. I strongly suggest you start from a simpler configuration before making thing complicated.

Alright so I’ll quickly reinstall OpenSUSE, connect 1 monitor. I’ll install Nvidia G03 from the repos and grab the logs right after that.

If I absolutely have to I’ll install KDE. Would that help at all? Or would Gnome not working also mean that even if KDE loads up it won’t be using Nvidia?

Alright well I’ll give it a fresh install, and reinstall Nvidia. I’ll post the logs from /var/log/gdm/ right after that. I’'l make sure only on display is hooked up.

Would KDE make any difference? Would Gnome not being able to display indicate that KDE wouldn’t either, and even if it did, it would be with Nouveau running, not Nvidia?

No KDE should handle lower level graphics better assuming failure of the NVIDIA driver. Note you can install both if one does not work you can fix thing in the other. It cost nothing but a bit of disk space

Well, it’s not GNOME or KDE that choose the driver.

If the nvidia driver does not work, KDE wouldn’t be able to use it either obviously. And if you have the nvidia packages installed, nouveau couldn’t be used either because the packages blacklist it (otherwise it would be impossible to load nvidia in the first place), you’d end up with the generic fbdev or vesa driver and no OpenGL support (because nvidia breaks Mesa, so not even Mesa’s software renderer could be used). KDE might start despite of that, but it might also crash, depending on the settings.

OTOH, you might just have missed to install nvidia’s GL support (package nvidia-glG0X), or the package did not activate nvidia’s libglx properly for some reason. In that case the nvidia driver would be in use, but OpenGL would be broken anyway.
The Xorg log should tell.