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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).