So, today I wake up not being able to access any TTY console. Ctrl+Alt+F[1-6] is just not working, just open up a completely black screen.
I tried to switch to true text-mode by configuring Grub, assuming the graphical text-mode resolution set at boot wasn't compatible with my video card.
sudo sed -i -e 's/#GRUB_TERMINAL/GRUB_TERMINAL/g' /etc/default/grub
Here's some info:
lsb_release -a && uname -r
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 13.10
lspci -nn | grep VGA
00:02.0 VGA compatible controller : InnoTek Systemberatung GmbH VirtualBox Graphics Adapter [80ee:beef]