7 years ago
Here a fix whenever de addition drivers of virtualbox are not able to work properly on your system.
I personally solved the resolution problem with this ! Afther this is was able to go 1920 x 1080.
After a while a found this hint on the internet to use to X11 drivers from the repository, and solved te problem.
This is what you do:
Open The Terminal.
Type in the following: $ sudo apt-get install virtualbox-ose-guest-x11