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

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Message-ID: <20090625094152.179740c0@jbarnes-g45>
Date:	Thu, 25 Jun 2009 09:41:52 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Andres Freund <andres@...razel.de>
Cc:	LKML <linux-kernel@...r.kernel.org>, Eric Anholt <eric@...olt.net>,
	Dave Airlie <airlied@...hat.com>
Subject: Re: [BUG] GM45 blanks shortly after boot in 2.6.30-git

On Thu, 25 Jun 2009 10:30:23 +0200
Andres Freund <andres@...razel.de> wrote:

> 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.

So the i915 driver probably loaded and turned off your display, either
by programming a bad mode or misdetecting something else...

> Any other information needed?

Can you try loading the drm module with debug=1?  That should give us
some more info about what's going on.

A bisect would help too of course...

-- 
Jesse Barnes, Intel Open Source Technology Center
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