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How can I get my graphics card to be recognized in System Info?

I am using Nvidia 9500GT Graphics Card and so I use Nvidia Proprietory Driver as my Driver enter image description here

But in the System Detail it shows Graphics Unknown why? enter image description here

marked as duplicate by Anwar, Jorge Castro, Eliah Kagan, Mitch, stephenmyall Oct 3 '12 at 8:14

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

sudo apt-get install mesa-utils

Install it & it will show you

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