About your driver upgrade? Did you installed a driver PPA and installed some driver that was not guaranteed to work or it was a Ubuntu bug, you did your regular

About your driver upgrade? Did you installed a driver PPA and installed some driver that was not guaranteed to work or it was a Ubuntu bug, you did your regular updates (no PPA) and it broke your system? I also had this issues because I wanted to try newer drivers, it is expected if the new driver does not work I go in terminal and install the previous working version. I personally prefer how easy is to test different driver version in Linux while in Windows I needed to make an account to upgrade my NVIDIA drivers(maybe you can avoid creating an account I am not 100% sure but at that time I was dual booting to play some game and I did not had a weekend to spend o how to upgrade my drivers without an account ... in the end I could not solve the issue where Oblivion had a black screen and I played it with Wine in Linux)