Reconfiguring Xorg on Debian/Ubuntu

In case, "you've encountered that dpkg-reconfigure xserver-xorg" is not working, you may try this one:
 

Code:

ctrl-alt-f1

To exit the gui.
Now login as root,and enter the following commands:

Code:

# /etc/init.d/gdm stop  (to stop gdm/kdm as required.)
# X -configure
# mv ~/xorg.conf.new /etc/X11/xorg.conf
# /etc/init.d/gdm start

You should now be back in the gui,but you need to logout as root:

Code:

ctrl-alt-f1 again.
ctrl-d
ctrl-alt-f7

Once you get to this point you should have a working xorg.conf file.
I've found this solution on this forum: 
http://www.linuxquestions.org/questions/debian-26/how-to-install-nvidia-drivers-for-debian-gnu-linux-749929/