[Intel-gfx] I915 regression : black screen at boot / Sandybridge Mobile (GT2)

[Eugeni Dodonov]

On Jan 12, 2012 8:45 PM, "Jesse Barnes" <jbarnes at virtuousgeek.org> wrote:
>
> On Thu, 12 Jan 2012 23:42:35 +0100
> Vincent Vanackere <vincent.vanackere at gmail.com> wrote:
>
> > On Thu, Jan 12, 2012 at 23:24, Jesse Barnes <jbarnes at virtuousgeek.org
>wrote:
> >
> > > On Thu, 12 Jan 2012 23:21:10 +0100
> > > Vincent Vanackere <vincent.vanackere at gmail.com> wrote:
> > > > I'm happy to report that this patch indeed fixes the issue for me
(tested
> > > > both on linus' master and drm-intel-next).
> > > > Note that I had to apply it by hand (the patch was mangled by your
mailer
> > > > ?), therefore I'm resending your fix as an attachment in case other
> > > people
> > > > are interested.
> > > >
> > > > Many thanks for the quick fix !
> > >
> > > Great, thanks for testing.  Your fixed up patch was missing one line
> > > though, can you re-test with it added?
> > >
> > > After the:
> > >        temp &= ~PORT_TRANS_SEL_MASK;
> > > you need to also add a:
> > >        temp |= PORT_TRANS_SEL_CPT(pipe);
> > >
> > > in case you end up running the LVDS off of transcoder B.
> > >
> > >
> > Tested with the (attached, hopefully correct) patch and it still works.
:-)
>
> Yay, thanks a lot!  I'll send it upstream now.
>

Jesse, if you want, you can include my r-b into it as well!
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