DISABLE FRAMEBUFFER on UBUNTU SERVERS

edit with $sudo nano /etc/default/grub

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.

GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="noquiet nomodeset nosplash noplymouth"            #<<<insert "nomodeset noplymouth" 
GRUB_CMDLINE_LINUX=""
...

update grub Loader with

sudo update-grub2