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