[ubuntu] Use ONLY nVidia discrete graphics on Optimus laptop N56VZ Ubuntu 13.04

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http://ubuntuforums.org – I used to have an ASUS G74Sx RoG laptop with an nVidia GeForce GTX 560M 3GB on Ubuntu 13.04 on which I used the nVidia proprietary drivers (310 I think) from my Additional Drivers section of my software sources. Everything worked great. I recently purchased a new N56VZ which I was led to believe had a GeForce GT 650M 2GB, but I had no idea about the nVidia Optimus technology or that it was actively using both integrated and dedicated graphics. I assumed it was like every other computer I've used before with a dedicated graphics card. What's worse is neither the retailer nor ASUS has any indic (Hardware)