Problem: Nouveau the free Version of the Nvidia Display Driver crash if you switch to Console or kill the xserver-xorg.Its enabled by default inside the KERNEL!! this WAS NOT DEFAULT at last DECADES!! (DEBIAN 3.0-5.0 never used it!, cause bugs and hanging Servers)
Solution:
echo 'blacklist nouveau' > /etc/modprobe.d/blacklist-nouveau.conf
then 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 nouveau.nomodeset=0" #on Ubuntu set "nomodeset noplymouth" ...
update grub Loader with
sudo update-grub2
REMARK: THIS MUST BE USED AT SERVERS FOR STABILITY!! REMOVE / BLACKLIST ALL UNEEDED DRIVER MODULES LIKE SOUND!
(DISABLE ALWAYS UNNEEDED CHIPS AT YOUR BIOS AGAINST PROBLEMS AND ENERGY COSTS)