Comment 5 for bug 1475094

Noticed this error for the first time today running `sudo apt upgrade`. Also for the first time (single user account laptop) had to sign on to console (ctrl+alt+F1) and (ctrl+alt+f2) because Ubuntu 16.04 login screen wasn't working due to activating Nvidia 367.44 driver in `Additional Drivers` screen.

Signing into console was necessary for the first time ever in order to restore Intel integrated graphics and using the system normally.

(Kernel version 4.7.5)