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

[Vincent Vanackere]

On Thu, Jan 12, 2012 at 20:29, Eugeni Dodonov <eugeni at dodonov.net> wrote:

> On Thu, Jan 12, 2012 at 17:25, Jesse Barnes <jbarnes at virtuousgeek.org>wrote:
>
>> On Thu, 12 Jan 2012 20:08:59 +0100
>> Vincent Vanackere <vincent.vanackere at gmail.com> wrote:
>> > > Thanks for the report... do you also have:
>> > >
>> > > commit 7a4198664d46b87025a64530f1530ab2bea54c19
>> > > Author: Jesse Barnes <jbarnes at virtuousgeek.org>
>> > > Date:   Tue Nov 15 10:28:53 2011 -0800
>> > >
>> > >    drm/i915: don't disable a PCH DPLL that's in use
>> > >
>> > >
>> > > commit d8e70a254d8f2da141006e496a51502b79115e80
>> > > Author: Jesse Barnes <jbarnes at virtuousgeek.org>
>> > > Date:   Tue Nov 15 10:28:54 2011 -0800
>> > >
>> > >    drm/i915: only set the intel_crtc DPMS mode to on if the mode set
>> > > succeeded
>> > >
>> > > in your tree?  Those are needed to fix some 3 pipe related bugs.
>> > >
>> > > --
>> > > Jesse Barnes, Intel Open Source Technology Center
>> > >
>> >
>> > Yes, these commits were present. To double-check I just tested the
>> latest
>> > tip at a429638cac1e5c656818a45aaff78df7b743004e and the problem is still
>> > there.
>>
>> Stefan, you have the same machine?  I wonder if it's an eDP config; my
>> t420 here works ok with current bits, but it uses LVDS.
>>
>
> If you are using eDP, you might be facing
> https://bugs.freedesktop.org/show_bug.cgi?id=42263 or
> https://bugs.freedesktop.org/show_bug.cgi?id=42278.
>
>
> Could you try with patch mentioned at
> https://bugs.freedesktop.org/show_bug.cgi?id=42263 reverted?
>
> --
> Eugeni Dodonov
>  <http://eugeni.dodonov.net/>
>

(I've had a quick look and I doubt this is related since my issue was
already present in 3.2-rc1 where this patch was not yet applied...)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx/attachments/20120112/afac1ff4/attachment.html>