Note: This is not for the older versions of Ubuntu.
1. Go to Nvidia site and download the driver for your model.
2. Save the driver somewhere on your file system, that may be your home folder or /opt.
3. Press Ctrl+Alt+F1 and go to terminal. Enter terminal as root.
4. Then to end xserver, type the following command:
# /etc/init.d/gdm stop
5. Go into the directory where you placed your Nvidia driver and type the following command:
# sh xxxxxxxxxxxxxxxxxx.run
7. The installation of the driver will begin. Wait for it to finish.
8. To start xserver again, type the following command:
# /etc/init.d/gdm start
9. Once again login into the xserver and you should see the desktop effects enabled. If not, manually enable the effects in System -> Preferences -> Appearance (under the Visual Effects tab).
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