loading i915 with two graphics cards

[Pedro Andrés Aranda Gutiérrez]

BTW, there was some code around in the switcher and in mackintosh lists on this. File was something like gmux.c



On 28 Jul 2016, at 11:45, Francois Tigeot <ftigeot at wolfpond.org> wrote:

> On Thu, Jul 28, 2016 at 10:49:26AM +0200, Pedro Andres Aranda Gutierrez wrote:
>> Similar problem here with an ASUS with nVidia Optimus... So it's not Mac
>> specific...
> 
> Well, in a way it is.
> 
> If I'm not mistaken, most Optimus devices have their video outputs directly
> connected to the Intel GPU so it's just a matter of disabling the NVidia one.
> 
> On at least some Macbook models, the video output are connected to a third
> chip, and this chip must also be told to talk exclusively to the Intel GPU at
> boot time first.
> 
> --
> Francois Tigeot

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