For me the gvm blackscreen could be fixed by installing ubuntu-gnome-desktop and then running "sudo dpkg-reconfigure lightdm". However, this created an endless login loop for all users. The way to fix the endless loop problem was to select the Mate desktop environment before logging in. Then everything worked. Choosing Compiz or Metacity Window Manager keeps you looping.
For me the gvm blackscreen could be fixed by installing ubuntu- gnome-desktop and then running "sudo dpkg-reconfigure lightdm". However, this created an endless login loop for all users. The way to fix the endless loop problem was to select the Mate desktop environment before logging in. Then everything worked. Choosing Compiz or Metacity Window Manager keeps you looping.