5 Insert the following lines to the blacklist.conf:
blacklist nouveau blacklist lbm-nouveau options nouveau modeset=0 alias nouveau off alias lbm-nouveau off
6 Save and exit.
7 Disable the Nouveau kernel by typing the following commands(nouveau-kms.conf may not exist, it is ok):
echo options nouveau modeset=0 | sudo tee -a /etc/modprobe.d/nouveau-kms.conf
8 Build the new kernel:
sudo update-initramfs -u
9 Reboot.
10 After the reboot you need to exit the X Server, for that we need to stop LightDM, press Ctrl+Alt+F1 in the logging screen, log in with your user and password, after that:
sudo service lightdm stop
11 Now install your Nvidia driver:
sudo apt-get install nvidia-VERSION
12 Reboot.
This worked for me, I have a HP G60-125NR AMD Turion X2 64bits with a Nvidia 8200M G. This tutorial may not work if you need to install "bumblebee" too, I don't know how to configure it cuz I don't need it, you will have to read somewhere else about that.