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, 3 Jul 2008 23:29:27 +0100 [thread overview]
Message-ID: <20080703222927.GA2701@srcf.ucam.org> (raw)
In-Reply-To: <20080703162152.GC29110@srcf.ucam.org>
On Thu, Jul 03, 2008 at 05:21:52PM +0100, Matthew Garrett wrote:
> On Thu, Jul 03, 2008 at 06:08:59PM +0200, Thomas Renninger wrote:
>
> > + if (ACPI_SUCCESS(acpi_get_handle(device->handle, "DRDY", &h_dummy))) {
> > + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found IGD device\n"));
> > + video_caps |= ACPI_VIDEO_IGD;
> > + }
>
> In principle, it's possible for a vendor to implement opregion but not
> actually use it until the tche flags are set. If anyone's done that then
> you've just broken backlight control on their system.
I've just had it confirmed that recent Panasonics behave this way. I
suspect the same's true of many 965 systems.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2008-07-03 22:29 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 [this message]
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
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080703222927.GA2701@srcf.ucam.org \
--to=mjg59@srcf.ucam.org \
--cc=ak@linux.intel.com \
--cc=carlos@strangeworlds.co.uk \
--cc=corentincj@iksaif.net \
--cc=corsac@debian.org \
--cc=dannybaumann@web.de \
--cc=hmh@hmh.eng.br \
--cc=julia.jomantaite@gmail.com \
--cc=jwoithe@physics.adelaide.edu.au \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-next@vger.kernel.org \
--cc=malattia@linux.it \
--cc=marcus@better.se \
--cc=mzxreary@0pointer.de \
--cc=rui.zhang@intel.com \
--cc=stelian@popies.net \
--cc=trenn@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.