Dang, that’s rough. So I have not a clue why it would be doing that on a simple driver update unless the driver got corrupted. I would try booting directly to the command line next time if it happens again, maybe try booting the recovery partition. Sounds like you’d be able to get a terminal there and then you can use apt purge to remove and reinstall and see if that helps.

I’ve had to do the apt purge route myself for a few failed updates myself, mostly odd little application updates, and that clears up the issues.

Good luck!