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I have a Dell n5110 laptop which comes with a regular nvidia GPU and an Itel CPU, interconnected via optimus. While there is no problem in windows 7, the real problem is with linux. The GPU is always on though not detected by linux and usesa lot of power.
Is there is way I can switch off this in linux?
It'll be a BIOS setting if it's at all possible. Depends on the hardware - it's possible on Thinkpads for sure but you'll have to check if there's a discrete/integrated setting for your machine. – YXD – 2012-02-20T16:44:50.607
If it is not possible, try Bumblebee, as proposed below. While it's not perfect, works quite well. – Renan – 2012-02-20T21:01:45.687