Yeah, it’s an Nvidia GPU on Ubuntu. I tried several versions of the proprietary Nvidia drivers and some open source ones I located via Ubuntu’s Additional Drivers application, and they all left my computer in an unusable state, but in different ways.
Buying a new GPU isn’t an option at the moment, and… yeah, just don’t have enough time to go experimenting with different distros to find the right combination of hardware compatibility and features. I still think it was a worthwhile experiment, and I’m glad I gave Linux a try. But it’s not the right OS for where I’m at right now.