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I have a nvidia geforce 840m with intel hd graphics and an intel i7 4th generation, its an asus laptop k550l. I am wondering if i can use the nvidia optimus technology with bumblebee even if it is not specified with a stick or anything on my laptop, I know it increases battery life and that is my main problem so far. thanks!

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Go to

System Settings > Software & Updates > Additional Drivers

Choose your preferred drivers.

With Bumblebee if you want to run an application using dedicated graphics use:

    optirun <AppName>
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Up until 2013, nVidia didn't have any plans to support optimus technology in Linux. That's the reason project Bumblebee had started. But in May 2013, nVidia started providing partial support for optimus tech on Linux and it has been quite some time.

But Bumblebee has evolved a lot and is officially supported by Ubuntu since Ubuntu 13.10. You can head over to the wiki page and install the bumblebee drivers and try them out. It is quite battery efficient and is also suggested by steam for running steam games on linux. And if it doesn't suit your needs, you can definitely fall back to the proprietary nVidia drivers and install them from System Settings > Software & Updates > Additional Drivers

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