From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Yu Luming <luming.yu@gmail.com>,
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
Date: Wed, 11 Oct 2006 08:04:12 +0100 [thread overview]
Message-ID: <20061011070412.GA6128@srcf.ucam.org> (raw)
In-Reply-To: <1160549944.3000.347.camel@laptopd505.fenrus.org>
On Wed, Oct 11, 2006 at 08:59:04AM +0200, Arjan van de Ven wrote:
> it'd also be nice if the linux-ready firmware developer kit had a test
> for this, so that we can offer 1) a way to test this to the bios guys
> and 2) encourage adding/note the lack easily
Sure. Reading /proc/acpi/video/*/*/info should tell you whether a device
is an LCD or not. The brightness file should then contain a list of
available brightnesses, and writing one into there should change the
screen value. There's a patch somewhere that ports this to the
/sys/class/backlight infrastructure, but I don't think it's applied yet.
I'd write a test up for you, but I don't actually seem to have any
hardware that implements this properly. Tch.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2006-10-11 7:04 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-30 17:08 [PATCH 2.6.18-mm2] acpi: add backlight support to the sony_acpi driver Alessandro Guido
2006-09-30 17:14 ` Alessandro Guido
2006-09-30 17:31 ` Jan Engelhardt
2006-10-02 0:19 ` Andrew Morton
2006-10-02 0:39 ` Matt Domsch
2006-10-02 0:48 ` Matt Domsch
2006-10-05 10:36 ` Pavel Machek
2006-10-06 21:17 ` Matt Domsch
2006-10-06 22:44 ` Pavel Machek
2006-10-10 14:32 ` Yu Luming
2006-10-10 14:47 ` Richard Hughes
2006-10-10 16:10 ` Matt Domsch
2006-10-11 16:28 ` Yu Luming
2006-10-16 17:45 ` Yu Luming
2006-10-25 7:07 ` Pavel Machek
2006-10-25 17:26 ` Luming Yu
2006-10-27 17:24 ` Luming Yu
2006-10-29 17:50 ` Pavel Machek
2006-10-30 15:49 ` Luming Yu
2006-10-25 17:27 ` Luming Yu
2006-10-10 21:26 ` Matthew Garrett
2006-10-11 3:02 ` Matt Domsch
2006-10-11 3:16 ` Matthew Garrett
2006-10-11 16:37 ` Yu Luming
2006-10-11 6:59 ` Arjan van de Ven
2006-10-11 7:04 ` Matthew Garrett [this message]
2006-10-11 8:04 ` Ismail Donmez
2006-10-11 8:04 ` Ismail Donmez
2006-10-11 8:12 ` Matthew Garrett
2006-10-11 16:31 ` Yu Luming
2006-10-11 16:45 ` Ismail Donmez
2006-10-02 10:29 ` Holger Macht
2006-10-02 11:25 ` Alessandro Guido
2006-10-10 15:17 ` Yu Luming
2006-10-10 15:22 ` Richard Hughes
2006-10-10 21:23 ` Matthew Garrett
2006-10-11 3:20 ` Dmitry Torokhov
2006-10-11 16:48 ` Yu Luming
2006-10-11 19:08 ` Dmitry Torokhov
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