linux-kernel - Re: [PATCH 2/3] ideapad: Add nodes in sysfs

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Message-ID: <4DE7629D.80205@canonical.com>
Date:	Thu, 02 Jun 2011 18:14:53 +0800
From:	Ike Panhc <ike.pan@...onical.com>
To:	Corentin Chary <corentin.chary@...il.com>
CC:	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org, Matthew Garrett <mjg@...hat.com>,
	Randy Dunlap <rdunlap@...otime.net>
Subject: Re: [PATCH 2/3] ideapad: Add nodes in sysfs

On 06/02/2011 05:48 PM, Corentin Chary wrote:
> Hi Ike,
> Why do you want to add /sys/devices/platform/ideapad/brightness and
>     /sys/devices/platform/ideapad/backlight ?
> Both of these files should be handled by the generic backlight class
> (using brightness and bl_power).

This is within VPC2004. In DSDT they are different device from generic
backlight.

and I try bl_power but can not turning off power of whole LCD. No idea
how screensaver do it, looks like just cut off video signal.
  
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