From: Matthew Garrett <mjg59@srcf•ucam.org>
To: Thomas Renninger <trenn@suse•de>
Cc: ak@linux•intel.com, linux-acpi@vger•kernel.org,
Henrique de Moraes Holschuh <hmh@hmh•eng.br>,
Carlos Corbacho <carlos@strangeworlds•co.uk>,
Jonathan Woithe <jwoithe@physics•adelaide.edu.au>,
malattia@linux•it, stelian@popies•net,
linux-next@vger•kernel.org,
Corentin CHARY <corentincj@iksaif•net>,
Lennart Poettering <mzxreary@0pointer•de>,
Julia Jomantaite <julia.jomantaite@gmail•com>,
corsac@debian•org, dannybaumann@web•de, marcus@better•se,
Zhang Rui <rui.zhang@intel•com>
Subject: Re: [PATCH 2/2] ACPI Check for backlight support via ACPI video.ko otherwise use vendor ACPI drivers
Date: Thu, 10 Jul 2008 12:53:17 +0100 [thread overview]
Message-ID: <20080710115317.GA7013@srcf.ucam.org> (raw)
In-Reply-To: <200807101336.08035.trenn@suse.de>
On Thu, Jul 10, 2008 at 01:36:04PM +0200, Thomas Renninger wrote:
> On Thursday 10 July 2008 13:19:00 Matthew Garrett wrote:
> > No, I said that on Thinkpads with a PWM method, the PWM method has to be
> > called in order to avoid the delay. There's no need for a blacklist.
>
> Ok.
> I just got a report that Dells must not use the video driver:
> https://bugzilla.novell.com/show_bug.cgi?id=404627
>
> They have a really ugly dcdbas driver which issues SMIs triggered from
> userspace.
If the ACPI video driver has bound, then using the dcdbas mechanism for
backlight control is incorrect. I wasn't aware that any Dells actually
implemented that. The correct thing is for userspace to stop using
dcdbas if a real backlight control is available, not to cripple the
ACPI video driver.
--
Matthew Garrett | mjg59@srcf•ucam.org
next prev parent reply other threads:[~2008-07-10 11:53 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-03 16:08 [PATCH 2/2] ACPI Check for backlight support via ACPI video.ko otherwise use vendor ACPI drivers Thomas Renninger
2008-07-03 16:21 ` Matthew Garrett
2008-07-03 22:29 ` Matthew Garrett
2008-07-09 14:49 ` Thomas Renninger
2008-07-09 14:57 ` Matthew Garrett
2008-07-09 16:00 ` Thomas Renninger
2008-07-10 10:07 ` Matthew Garrett
2008-07-10 11:00 ` Thomas Renninger
2008-07-10 11:09 ` Matthew Garrett
2008-07-10 11:15 ` Thomas Renninger
2008-07-10 11:19 ` Matthew Garrett
2008-07-10 11:36 ` Thomas Renninger
2008-07-10 11:53 ` Matthew Garrett [this message]
2008-07-10 12:19 ` Thomas Renninger
2008-07-10 12:24 ` Matthew Garrett
2008-07-10 12:48 ` Thomas Renninger
2008-07-10 12:58 ` Matthew Garrett
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