If you are using an older version of Ubuntu, or if you aren’t notified about additional drivers, you can launch the installation yourself.
Step 1 : Go to Software & Updates -> Additional Drivers
Then you’ll see that Nvidia drivers are not in use.
Step 2 : To Check or tick the box underneath Enabled to enable the drivers.
Step 3 : Click Enable Driver.
Step 4 : Wait for the installer file to download.
Step 5 : Open the downloaded file.
Step 6 : Right click on downloaded file and mark it as execute.
Step 7 : The drivers can only be installed in command mode, under sudo and the graphics daemon must not be running.
Step 8 : Switch to command mode tty CTRL+ALT+F1, then run following command to stop the display manager.
sudo service lightdm stop
Step 9 : If you see a blank screen, that means the mode resolution conflicts with improper video driver. Fix that by running this..
sudo sed -i -e ‘s/#GRUB_TERMINAL/GRUB_TERMINAL/g’ /etc/default/grub
Step 10 : Run your nvidia installer by using following command.
You’ll then see that the drivers are enabled and will be available for use upon a reboot.