[Intel-gfx] [PATCH v5 00/12] Enable GPU switching on pre-retina?MacBook Pro

[Bastien Nocera]

On Sat, 2016-03-05 at 15:16 +0100, Lukas Wunner wrote:
> Hi Bastien,
> 
> On Fri, Mar 04, 2016 at 04:12:27PM +0000, Bastien Nocera wrote:
> > 
> > Lukas Wunner <lukas <at> wunner.de> writes:
> > > 
> > > Enable GPU switching on the pre-retina MacBook Pro (2008 - 2013),
> > > v5.
> > I've tested your patchset on a MacBookPro8,1, with an integrated
> > Intel and
> > discrete AMD/ATI GPUs.
> Hm, it must be either an 8,2 or 8,3. The 8,1 was a 13" machine and
> only
> had an integrated GPU.

On the 8,2, still, and with the kernel from the COPR repo[1].

I tried running:
echo DIGD > switch

to (later) switch to the integrated GPU. Log out, get to gdm, log back
in to a black screen with the cursor visible and nothing else.

I'm wondering if it's the gdm X11 session running in the background
that makes this fail.

I'd like to try and get this working properly before bringing the
runtime PM support into it.

[1]: That's the list of patches in the kernel:
http://copr-dist-git.fedorainfracloud.org/cgit/firstyear/kernel-mbp/kernel.git/tree/