linux-kernel - Re: Dell-laptop is not working without wireless

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Message-Id: <20090903153215.E51F8526EA5@mailhub.coreip.homeip.net>
Date:	Thu, 3 Sep 2009 07:59:21 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Mario Limonciello <mario_limonciello@...l.com>
Subject: Re: Dell-laptop is not working without wireless

On Tue, Aug 18, 2009 at 01:10:49PM +0100, Matthew Garrett wrote:
> On Mon, Aug 17, 2009 at 10:32:27PM -0700, Dmitry Torokhov wrote:
> 
> > dell-laptop module does not work on my Latitude d630 unless driver for
> > my wireless card (which happens to be iwl3945) is already loaded.
> > Otherwise dcsbas_smi_request() returns all zeroes which causes
> > dell-laptop to not create any rfkill devices nor install backlight
> > device:
> 
> That's quite bizarre. I'd had one report of the backlight setup failing, 
> but hadn't connected it with wireless driver loading. Long shot, but I 
> don't suppose you can figure out which bit of the wifi config is needed 
> to get dell-laptop working by just bailing at various bits of the probe 
> and seeing if you get sensible answers?
> 

Admittedly I have not spend much time on it but it looks like my box
_really_ wants wifi interface to be fully operational before
dcsbas_smi_request() starts returning proper data. I wonder if iwl3945's
rfkill support interferes somehow here...

Maybe Mario (being a Dell guy) has an idea why this might be happening?

-- 
Dmitry
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