From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Stefan G. Weichinger" <lists@xunil.at>
Subject: Re: I915 regression : black screen at boot /
 Sandybridge Mobile (GT2)
Date: Fri, 13 Jan 2012 00:10:43 +0100
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Am 2012-01-12 23:41, schrieb Stefan G. Weichinger:
> Am 2012-01-12 23:24, schrieb Jesse Barnes:
>> On Thu, 12 Jan 2012 23:21:10 +0100
>> Vincent Vanackere <vincent.vanackere@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.
> 
> I'd love to test that patch here as well, as far as I see the
> gentoo-package doesn't even contain your patched file. Might be a
> different release or so ... ( x11-libs/libdrm-2.4.30 ).
> 
> Maybe the gentoo-dev picks up that issue soon anyway ;-)

Thanks again, Vincent, for pointing me at the fact that this is a patch
for the kernel ;-)

applied it, works for me as well!

Thanks, Jesse!