This question is an exact duplicate of:
Ok, so I decided to install more recent drivers because I started experiencing some crashes with Rust. Don't think it's related, but that's the first thing I would do in windows.
So, I found out how to exit X and install it there, did it and it all looked fine. Went through the prompts, accepted everything and then restarted.
Now, every time I boot, I get past grub and then I get a black screen with a flashing dash.
I can get to recovery mode, but I don't know what to do there.