Return-Path: <linux-kernel-owner+willy=40w.ods.org-S1030431AbWJJV0a@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1030431AbWJJV0a (ORCPT <rfc822;willy@w.ods.org>);
	Tue, 10 Oct 2006 17:26:30 -0400
Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030432AbWJJV0a
	(ORCPT <rfc822;linux-kernel-outgoing>);
	Tue, 10 Oct 2006 17:26:30 -0400
Received: from cavan.codon.org.uk ([217.147.92.49]:25217 "EHLO
	vavatch.codon.org.uk") by vger.kernel.org with ESMTP
	id S1030431AbWJJV03 (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Tue, 10 Oct 2006 17:26:29 -0400
Date: Tue, 10 Oct 2006 22:26:15 +0100
From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Yu Luming <luming.yu@gmail.com>
Cc: Matt Domsch <Matt_Domsch@dell.com>, Pavel Machek <pavel@ucw.cz>,
       Andrew Morton <akpm@osdl.org>,
       Alessandro Guido <alessandro.guido@gmail.com>,
       linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
       len.brown@intel.com, jengelh@linux01.gwdg.de, gelma@gelma.net,
       ismail@pardus.org.tr
Subject: Re: [PATCH 2.6.18-mm2] acpi: add backlight support to the sony_acpi driver
Message-ID: <20061010212615.GB31972@srcf.ucam.org>
References: <20060930190810.30b8737f.alessandro.guido@gmail.com> <20061005103657.GA4474@ucw.cz> <20061006211751.GA31887@lists.us.dell.com> <200610102232.46627.luming.yu@gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200610102232.46627.luming.yu@gmail.com>
User-Agent: Mutt/1.5.9i
X-SA-Exim-Connect-IP: <locally generated>
X-SA-Exim-Mail-From: mjg59@codon.org.uk
X-SA-Exim-Scanned: No (on vavatch.codon.org.uk); SAEximRunCond expanded to false
Sender: linux-kernel-owner@vger.kernel.org
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 692
Lines: 21

On Tue, Oct 10, 2006 at 10:32:46PM +0800, Yu Luming wrote:

> >From my understanding, a cute userspace App shouldn't have this kind
> of logic:

(snip switching on hardware type)

> It should be:
> 	just write/read  file in  /sys/class/backlight ,....

Yup, but to do that on Dell hardware is basically impossible. It'd be 
nice if they implemented the ACPI video extension properly for future 
hardware.

-- 
Matthew Garrett | mjg59@srcf.ucam.org
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/