I can confirm this problem, just updated the system and Xorg session wasn't starting, I was able to install the latest drivers using another tty and enabling the graphics drivers ppa, but, yes, I restarted the computer and saw just a black screen.
I can confirm this problem, just updated the system and Xorg session wasn't starting, I was able to install the latest drivers using another tty and enabling the graphics drivers ppa, but, yes, I restarted the computer and saw just a black screen.