I was doing some more digging, found this thread:
That led to me generating the nvidia crash report which didn't tell me anything new, but did confirm it down to 'driver not responding'.
I then found this thread based on the idea that nvidia driver not working with kernel 6.5.0 27:
Where basically gcc version needs to be 12 for it to be compiled and work. So I followed the commands outlined -
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-11 11
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 12
sudo update-alternatives --config gcc
(select gcc-12 here)
And then redid the steps from this forum post:
And voila! All three monitors working again and graphics reports using the card.
Thank you for your help @swarfendor437 ! And I hope this helps anyone else who encounters this problem.
- Chris