How to update graphics card driver in ubuntu 12.04.1

Solution 1:

Go to 'System Settings' and under 'Hardware' section click on 'Additional Drivers'. It will automatically search for drivers and it will ask if you want to install the graphics drivers.

In short

System Settings -> 'Hardware' section -> Additional Drivers

PS:

You can search for System Settings in unity dash.

Just hit Super Key(that key which has windows logo between left Ctrl and left Alt on the bottom left of keyboard) and type System Settings and hit [ENTER] to open it.

Solution 2:

Follow these instruction it is helpful

go to System Setting

then Softwares and Updates

then additional drivers

then here you will find all list of drivers

for more clear explanation see here http://tech-blog.maddyzone.com/resources/how-to-update-driver-in-ubuntu

Solution 3:

You can also use the stable PPA, if you want to stay updated with your drivers:

1. Open a terminal and enter this command:

   sudo add-apt-repository ppa:ubuntu-x-swat/x-updates
   sudo apt-get update
   sudo apt-get install nvidia-current
   

2. Reboot your system and you're done