linux-kernel - Re: [PATCH] Sony laptop: Some Sony Vaia laptops do not enable wwan power by default.

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Message-ID: <49EF78F2.7040203@tpi.com>
Date:	Wed, 22 Apr 2009 14:07:14 -0600
From:	Tim Gardner <timg@....com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
CC:	malattia@...ux.it, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Sony laptop: Some Sony Vaia laptops do not enable wwan
 power by default.

Matthew Garrett wrote:
> On Wed, Apr 22, 2009 at 12:53:51PM -0600, Tim Gardner wrote:
>> Mattia,
>>
>> Does this patch makes sense for just the Vaio? I've had positive feedback from
>> the tester in the bug report.
> 
> It'd make more sense to change the wwan power option to use rfkill. That 
> way it'll be powered up at appropriate times.
> 

The laptop model that doesn't power up wwan on cold boot contains a
"Sony Programmable IO Control Driver" ("VGN-" according to the DMI
info). It appears that only laptops with a "Sony Notebook Control
Driver" enjoy rfkill goodness. I don't know for sure if those models
fail to power up wwan when rfkill is disabled.

rtg
-- 
Tim Gardner timg@....com www.tpi.com
OR 503-601-0234 x102 MT 406-443-5357
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