My laptop has 2 GPUs, the Intel HD Graphics 4000, and NVIDIA GeForce FT 650M. How do I switch between GPUs? I tried installing drivers from NVIDIA, but that ruined my Ubuntu installation, and I had to reinstall. The Additional Drivers in Settings don't list any Nvidia drivers either.
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I thought I had ruined my fresh install of Ubuntu 13.10 with installing the latest video drivers from NVida, then I came across this site: http://news.softpedia.com/news/How-to-Install-the-Latest-NVIDIA-331-20-Drivers-in-Ubuntu-13-10-399182.shtml The command line was a mess trying to install the latest drivers. As far as switching back and fourth would mean, correct me if I'm wrong here, just a change to the xorg.conf to point x to the other driver. Anyway I hope this is helpful. The PPA in that link is awesome guys over there to put the code injection for your current kernel version for the n – Michael G. Dec 17 '13 at 01:06
4 Answers
Your graphics card is not yet officially supported by Nvidia, and requires the bumblebee drivers for Linux. You can find more information on this post: Switchable laptop graphics issues on Ubuntu 12.04?
This might be slightly easier to use: WebUpd8
Just go to part 4, about graphics switching.
Also, take a ook at this more detailed explanation, also at WebUpd8:
http://www.webupd8.org/2013/02/bumblebee-31-released-with-primus.html

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1Please don't just link to an external site; Include all the usefull informations. Links rot. – Martin Schröder Jun 17 '15 at 15:29
Just get the latest driver from nVidia's website and allow executing it and you are good to go.

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This is way outdated!!
For Switching
Log out and back in nvidia-prime (best) Solid
On the Fly
Bumblebee (still problematic and difficult/tedious to install)
Trying to help Mark
p.s a new CLI (terminal) way to install your latest Drivers is
sudo ubuntu-drivers autoinstall

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1I'm sorry but please put a bit more effort in explaining what you suggest. I don't understand any of it. – Gladen Nov 03 '17 at 15:42