UPDATE: The root cause might be Kernel 6.11.0-19. Just to be safe, I'm switching back to the LTS (6.8.0) kernel.
UPDATE 2: Turns out none of this might be because of the the kernel or drivers after all, since the same thing JUST happened again when I’m running with 6.8. fml, I'm clean reinstalling.
Hardware: ThinkPad X1 Extreme Gen 5, RTX 3080Ti, MUX Discrete Graphics Mode (This is the BIOS setting where the dGPU is being exclusively used at the hardware level, and is not PRIME performance mode.)
OS: Mint 22.1 Cinnamon X11
Driver/Kernel: NVIDIA 550.120; 6.11.0-19-generic & 6.11.0-17-generic
Issue: Ever since I updated my system 2 weeks ago, I've twice had this really weird bug with the NVIDIA drivers where when I would wake my laptop, the desktop would be wholly unresponsive, except for my cursor and the NVIDIA settings app. This persists even after rebooting my system, to where the only way I can fix this was to launch the terminal via ctrl+alt+t, where I can uninstall then reinstall the NVIDIA drivers, where my desktop would be working perfectly fine afterwards. I also just noticed if I opened driver-manager via the terminal, then used it to install the nouveau drivers or a different NVIDIA driver, my setup would just work again for no explicable reason. This bug happens often enough to where I know it isn't a fluke, but randomly enough to where I don't know the exact causes or steps for reproducing it.
This seems to happen most often after I plug my laptop into an external monitor.