Back up original grub file:

sudo cp -n /etc/default/grub /etc/default/grub.orig

Create file for restore somewhere handy:

sudo vi GRUB_RESTORE_CMD

Insert this into the file:

sudo mv /etc/default/grub.orig /etc/default/grub && sudo update-grub

Now edit the grub file:

sudo vi /etc/default/grub

Find these lines:

GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash”

GRUB_CMDLINE_LINUX=”"

#GRUB_TERMINAL=console

...and change them to:

#GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash”

GRUB_CMDLINE_LINUX=”text”

GRUB_TERMINAL=console

Commit modifications...

sudo update-grub

..and reboot

sudo reboot now