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

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Message-ID: <20061002102959.GA21558@homac>
Date:	Mon, 2 Oct 2006 12:29:59 +0200
From:	Holger Macht <hmacht@...e.de>
To:	Andrew Morton <akpm@...l.org>
Cc:	Alessandro Guido <alessandro.guido@...il.com>,
	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 01. Oct - 17:19:12, Andrew Morton wrote:
> On Sat, 30 Sep 2006 19:08:10 +0200
> Alessandro Guido <alessandro.guido@...il.com> wrote:
> 
> > Make the sony_acpi use the backlight subsystem to adjust brightness value
> > instead of using the /proc/sony/brightness file.
> > (Other settings will still have a /proc/sony/... entry)
> 
> 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?

Most applications use HAL as a backend for display brightness these
days. HAL still supports the old interface in /proc for the different
brightness drivers, though, but the conversion to the new interface is on
my TODO and I will do it this week. So userspace should have fixed this
soon, so go ahead ;-)

Btw, there's a patchset from Matthew Garrett [1] sent some time ago which
also converts the asus_acpi, ibm_acpi and the toshiba_acpi drivers.

Regards,
	Holger

[1] http://lkml.org/lkml/2006/4/18/28
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