Help fixing virtual consoles (tty1-6) under VirtualBox

1. Upgrade VirtualBox to 4.1.6. using the procedure described in How do I install VirtualBox 4.1?

2. Download VirtualBox 4.1.6 Oracle VM VirtualBox Extension Pack and install it (just double click on the file).

3. Start your virtual machine and open a terminal.

4. Install your VirtualBox Guest Additions.

   sudo /etc/init.d/vboxadd setup
   

   Restart your guest.

   sudo apt-get purge virtualbox-guest-utils
   

5. The guest kernel is updated using the command:

   sudo /etc/init.d/vboxadd setup
   

   Restart your guest.

6. This package provides the X11 guest utilities for VirtualBox. These utilities are meant to be run inside the virtual machine.

   sudo apt-get install virtualbox-guest-utils
   sudo /etc/init.d/vboxadd setup
   

   Restart your guest.

7. Install VirtualBox Guest Additions

   sudo /etc/init.d/vboxadd setup
   

   Restart...

P.S : I recommend do it step by step and test with CTRL + F1. If something gord wrong just purge the package install in that step do it again. That is how I fixed in my own machine...