Friday, June 14, 2013

The system is running in low-graphics mode after upgrading the VirtualBox Guest additions to 4.2.12

I tried switching to use gdm instead of lightdm to see whether it could help but it didn't so I rolled back to v4.2.10 while waiting for v4.2.13 which was reported that this problem has been fixed.
  • Rebooted the machine in recovery mode in the Grub menu by, while booting:- 
    • Pressing ESC, or
    • Holding down the Shift key (this works better for me).
  • Uninstalled the VirtualBox Guest additions
cd /opt/VBoxGuestAdditions-4.2.12
  • After reboot, the screen was black. Here is what I did to fix this,
    • Pressed Cmd + F1 (or Alt + F1, don't know why Ctrl isn't needed on my machine) to switch to tty1.
    • Made LigthDM the default display manager
sudo dpkg-reconfigure lightdm
sudo reboot
        But it didn't work. It turned out that I also had to modify /etc/X11/default-display-manager to have the full path to lightdm like this.
Then rebooted,
sudo reboot
After that, I could continue installing the VirtualBox Guest additions v4.2.10 and now everything is back to normal.


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