linux-kernel - Re: [PATCH 2.6.18-mm2] acpi: add backlight support to the sony

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Date:	Mon, 2 Oct 2006 13:25:49 +0200
From:	Alessandro Guido <alessandro.guido@...il.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	len.brown@...el.com, jengelh@...ux01.gwdg.de, gelma@...ma.net,
	ismail@...dus.org.tr
Subject: Re: [PATCH 2.6.18-mm2] acpi: add backlight support to the sony_acpi
 driver

On Sun, 1 Oct 2006 17:19:12 -0700
Andrew Morton <akpm@...l.org> wrote:
> 
> umm, OK, but now how do I adjust my screen brightness? ;)
> 
> I assume that cute userspace applications for controlling backlight
> brightness via the generic backlight driver either exist or are in
> progress?  What is the status of that?
> 

I use this tool: http://www.xs4all.nl/~bsamwel/laptop_mode/tools/
that automagically fires up whenever needed

$ cat /etc/laptop-mode/batt-start/brightness 
#!/bin/sh
echo -n CHOOSE_A_LOW_VALUE > /sys/class/backlight/sony/brightness

and

$ cat /etc/laptop-mode/batt-stop/brightness 
#!/bin/sh
let val="`</proc/acpi/sony/brightness_default` - 1"
echo -n "$val" > /sys/class/backlight/sony/brightness

But I seldom use my laptop in battery mode.

> I assume that cute userspace applications for controlling backlight
> brightness via the generic backlight driver either exist or are in
> progress?  What is the status of that?
> 

I think the new gnome-power-manager does it, but I'm not sure since I use Xfce.

> Thanks.

Thank you.
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