I got bumblebee to work on hardened w/ SELinux. It is definitely ready for
use. Anyway, as has been explained, you basically HAVE to use optimus - if
you would like to return your laptop and/or sue the laptop manufacturer for
false advertising, now would be the time to do it.

On Tue, Dec 16, 2014 at 3:39 PM, Heiko Baums <lists@baums-on-web.de> wrote:
>
> Am 16.12.2014 um 12:55 schrieb behrouz khosravi:
>
> > I have not tried the bumblebee.
>
> You need bumblebee. Otherwise it's not possible to use the Nvidia
> Optimus chip.
>
> > I just waned to use optimus without that, but it seem the it is not easy!
>
> It's not possible, because the Nvidia Optimus chip isn't a full featured
> graphics card, and doesn't write directly to the screen. Joost already
> explained it pretty well.
>
> The 2D graphics is done by the GPU embedded in the CPU, which also
> writes the output to the screen. The Nvidia Optimus chip is only a
> helper chip to do the additional 3D rendering. It gives its output to
> the GPU embedded in the CPU which in turn writes the output to the screen.
>
> To use the Nvidia Optimus chip you need to install these packages:
>
> x11-misc/bumblebee
> x11-misc/virtualgl
> sys-power/bbswitch
> x11-drivers/nvidia-drivers
>
> I don't know if, but I don't think that, it will work with
> x11-drivers/xf86-video-nouveau.
>
> Then you need to add bumblebee and vgl to your default runlevel.
>
> rc-update add bumblebee
> rc-update add vgl
>
> To run a 3D application you need to start it with `optirun <command>`.
>
> And don't try to `eselect opengl set nvidia`. This won't work for the
> described reasons. You need to `eselect opengl set xorg-x11`.
>
> > I think I will try that sometime
>
> It's actually quite easy and the Nvidia Optimus support by bumblebee is
> pretty good.
>
> The reason why this is done this way is power saving. 3D rendering is
> pretty power-consuming.
>
> Heiko
>
>