Re: resume fails to light display on Macbook Pro Retina on 3.8-rc1

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On Wed, Feb 27, 2013 at 11:27:30PM +0000, James Courtier-Dutton wrote:
> On 26 February 2013 18:11, James Courtier-Dutton <james.dutton@xxxxxxxxx> wrote:
> > On 26 February 2013 17:35, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> >> On Mon, Feb 25, 2013 at 07:45:45PM -0800, Greg KH wrote:
> >>> On Mon, Feb 25, 2013 at 02:32:43PM -0800, Greg KH wrote:
> >>> > On Mon, Feb 25, 2013 at 04:06:02PM +1000, Dave Airlie wrote:
> >>> > > On Mon, Feb 25, 2013 at 3:52 PM, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> >>> > > > Hi Ben,
> >>> > > >
> >>> > > > My Macbook Pro Retina fails to resume properly on 3.8.  I tracked this
> >>> > > > down to commit 6c5a04249d7afeea3e0ed971e7813f84e29a1706 (drm/nvd0/disp:
> >>> > > > move link training helpers into core as display methods)
> >>> > > >
> >>> > > > Anything I can try to help solve this?
> >>> > > >
> >>> > > > Note, I'm using the Intel driver as the main controller for this laptop,
> >>> > > > well, I think I am, my xorg log is attached.
> >>> > >
> >>> > > No you are using the nvidia, the efi always boots nvidia enabled now.
> >>> >
> >>> > Really?  When did that change?  I thought I wanted to be using the Intel
> >>> > chip to save battery life.
> >>> >
> >>> > > btw I just tested my drm-next tree on mine and it resumed the display
> >>> > > fine, something oopsed a few seconds later that I haven't tracked down
> >>> > >
> >>> > > git://git.freedesktop.org/~airlied/linux drm-next
> >>> > >
> >>> > > I'll be sending it to Linus this evening or tomorrow morning, once I
> >>> > > fix my tree.
> >>> >
> >>> > Ok, I'll test again when it hits Linus's tree, and if that works, it
> >>> > would be good to try to work out what patch fixes it to get them into
> >>> > the 3.8-stable series so that others don't run into the same problem.
> >>>
> >>> I've tested Linus's tree now (I'm guessing it has all of your changes in
> >>> it), and it works!
> >>>
> >>> I see a bunch of patches marked for the stable branch, so I'll try those
> >>> out and see if they fix the problem.  If not, I'll let you and Ben know.
> >>
> >> I've applied the radeon patches tagged for -stable and tested that on
> >> 3.8.0, but that doesn't solve the resume problem.  Any ideas of anything
> >> else I can do to test this?  Doing a "backwards" git-bisect is a pain,
> >> but I guess I can do that to try to track down what patch fixed this, if
> >> that's the only idea people have...
> >>
> >
> > If it helps, I have a similar resume problem here.
> > 3.7.8 good
> > 3.8.0 bad
> >
> > Laptop with no nvidia, no amd graphics, just Intel Graphics 4000, 3rd
> > Gen I5 CPU.
> 
> Problem: "Backlight not coming on after resume."
> git finally bisected  for my Samsung Serial 7 Laptop.
> Bisecting: 0 revisions left to test after this (roughly 0 steps)
> [cf0a6584aa6d382f802f2c3cacac23ccbccde0cd] drm/i915: write backlight
> harder     <- This is the problem commit. Seems that fixing some
> machines breaks others, based on the existing comments on that patch.

Hm, so, 3.8.0 works for you, but 3.8.1-rc1 doesn't?  Or are you saying
Linus's tree doesn't work for you?

As you have a different issue here than the nvidia hardware I was
dealing with, you might want to try to start over with a new thread and
the needed info, and the needed people on it (i.e. the i915
maintainers and mailing list.)

thanks,

greg k-h
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