My terminal says:
$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 540M] (rev ff)
It seems to me that it is installed but can't find the control panel.
Best Answer
You can see what graphic card is installed by going in System Settings... → Software & Updates and select Additional Drivers tab:![Additional Drivers](https://i.stack.imgur.com/SkjGe.png)