linux-kernel - [Bisected] Output to external monitor is broken (Re: Linux 2.6.31-rc9)

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Message-ID: <20090906142206.GA4449@Pilar.aei.mpg.de>
Date:	Sun, 6 Sep 2009 16:22:06 +0200
From:	"Carlos R. Mafra" <crmafra2@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	ling.ma@...el.com
Subject: [Bisected] Output to external monitor is broken (Re: Linux
	2.6.31-rc9)

On Sat  5.Sep'09 at 16:54:27 -0700, Linus Torvalds wrote:
> Go wild, and please give this a final round of testing.

The output from my Vaio laptop to the external monitor (LG Flatron M228WD) 
is broken now. The screen is all messed-up once the boot messages from the
kernel appear on it (see the picture at the link below).

I bisected it down to f8aed700c6ec46ddade6570004ce25332283b306 ("drm/i915:
Set crtc/clone mask in different output devices"). I doubled checked
that reverting this commit from 2.6.31-rc9 fixes the problem.

The picture of the bad output is here:
http://www.aei.mpg.de/~crmafra/bad_output.jpg

as well as my config:
http://www.aei.mpg.de/~crmafra/config-2.6.31-rc9.txt

and dmesg (with the above commit reverted):
http://www.aei.mpg.de/~crmafra/dmesg-2.6.31-rc9+revert.txt

(the vga=0x0364 in the command line does not work since I
enabled KMS, so I get a prompt in the beginning from which I 
choose vga=0. But the above regression is not affected by this
choice because the command line was always the same during 
bisection)

If there is anything else I can do, just let me know.

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