MacBook Pro 10,1 + i915

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On Mon, Jul 01, 2013 at 10:39:14PM +0200, Marek Vasut wrote:
> Hi guys,
> 
> I recently got the rMBP 10,1 model, it has two graphic cards:
> 
> 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor 
> Graphics Controller (rev 09)
> 01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce GT 650M 
> Mac Edition] (rev a1)
> 
> I'm running linux 3.10-rc7 . The nvidia works with nouveau, but I'd prefer to 
> switch the nvidia off altogether and use the intel GPU.
> 
> So far I arrived at the point where I disabled X11, mounted debugfs and tried 
> the vgaswitcheroo. With the nvidia still in operation, I see the console. 
> Unfortunatelly, I end up with a black screen after I run the following command 
> to switch to the intel GPU:
> 
> echo IGD > /sys/kernel/debug/vgaswitcheroo/switch
> 
> If I try to switch back to the nvidia card (using echo DIS > ...), the screen 
> remains black. This state persists until reboot. I suspect [1] is the same bug, 
> none of the hints there helped.

It is not that bug. This bug I believe is that no one has figured out
how to reprobe the eDP and initialise it after a vgaswitch.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre


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