linux-kernel - [BUG] GM45 blanks shortly after boot in 2.6.30-git

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Message-ID: <4A43359F.3030208@anarazel.de>
Date:	Thu, 25 Jun 2009 10:30:23 +0200
From:	Andres Freund <andres@...razel.de>
To:	LKML <linux-kernel@...r.kernel.org>, Eric Anholt <eric@...olt.net>,
	Dave Airlie <airlied@...hat.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: [BUG] GM45 blanks shortly after boot in 2.6.30-git

Hi,

Somewhere between:
03347e2592078a90df818670fddf97a33eec70fb (2.6.30 + 5415 commits)
and
c82e6d450fda56cb2d4f68534173d3cd11b32f9f (2.6.30 + 8722 commits)
my Laptop (Lenovo T500) with an Intel GM45 graphics card blanks display 
during boot (before starting with initramfs) , stops responding to 
anything (i.e. no caps-lock light) and shows no further activity (i.e. 
no hdd activity).

Before the blank I did not see any sign of a backtrace or similar, but 
its hard to say there wasn't any. Unfortunately atm I don't have another 
computer nearby, so I could not get a network console output yet.

If you don't have a quick idea I will either get nearby another computer 
to get a trace or start bisecting.

As you can see can see in the attached config I am using kernel based 
modesetting - I will try disabling it during boot to see if there is a 
difference.

Any other information needed?

Andres

PS: There are some other problems with this card and current kernels (no 
real output on virtual consoles), but I will report that separately - I 
am just mentioning this for completeness sake

View attachment "dmesg-2.6.30-git.log" of type "text/plain" (72441 bytes)

View attachment "config-2.6.30-git" of type "text/plain" (69657 bytes)