Bug#849779: nvidia-driver: Nvidia packages crashed the OS - Not bootable after installing them

[Mariel Opazo Damiani]

Package: nvidia-driver
Version: dont know, had to purge it out of the system. Latest one available right before  Dec 30, 2016.
Severity: critical
Justification: breaks the whole system

Dear Maintainer,

Was trying to install an nvidia video card driver because linux didnt detect it existed at all. 
First tried with the package nvidia-detect but it said it didnt detect anything.
Then I manually downloaded the driver from nvidias webpage, installed it and nothing changed, no video card detected. 
Then moved onto the last thing I had read to work and added a non free repository so I could downlaod nvidia-smi and nvidia-driver. 
Downloaded both and also the package nvidia-xconfig, used the command "nvidia-driver" and followed it with "nvidia-xconfig", restarted the computer and it wouldnt boot. 
Had to purge all nvidia related packages out of my system and restore the file "xorg.conf" to its previous state (completely blank) to get my computer to work again.

The video card in question is NVIDIA GeForce 940-mx (2GB). Checked the supported video cards by NVIDIA and mine is one of them. 

-- System Information:
Debian Release: 8.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)