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: Thu, 12 Jan 2012 23:41:58 +0100
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To: Jesse Barnes <jbarnes@virtuousgeek.org>
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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, Stefan