Welcome to the Nvidia vs. Linux war!

1- First off purge all Nvidia drivers:

• sudo apt-get purge nvidia-*

2- Next, reconfigure your xorg:

• Make a copy and save it in a safe place >this file> /etc/X11/xorg.conf. If things go wrong you might need it later again:

sudo mv /etc/X11/xorg.conf /etc/X11/xorg.conf.BACKUP

The next steps will reconfigure your xorg and install nouveau drivers(intel GPU)

sudo apt-get install nouveau-firmware

sudo dpkg-reconfigure xserver-xorg

Now to get Nvidia on your Linux system you need BumbleBee!