From: Pavel Machek <pavel@suse.cz>
To: Gabor Gombas <gombasg@sztaki.hu>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>, Greg KH <greg@kroah.com>,
linux-pm@lists.osdl.org, linux-acpi@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [linux-pm] Re: [PATCH, RFC] [1/3] Generic in-kernel AC status
Date: Fri, 10 Feb 2006 13:21:31 +0100 [thread overview]
Message-ID: <20060210122131.GC4974@elf.ucw.cz> (raw)
In-Reply-To: <20060209085344.GF16052@boogie.lpds.sztaki.hu>
On Čt 09-02-06 09:53:44, Gabor Gombas wrote:
> On Wed, Feb 08, 2006 at 05:08:58PM +0000, Matthew Garrett wrote:
>
> > The backlight interface only supports exporting and setting the current
> > brightness. For various bits of hardware, the AC and DC brightnesses are
> > stored separately. Drivers would need to know which brightness value to
> > export to userspace. I have an HP backlight driver here which would
> > benefit from this, and I'm looking at the same issue for a Panasonic
> > one.
>
> I don't know the backlight interface but extending it to export all
> available brightness values would seem more logical to me.
>
> If I'd had a laptop I'd hate if I could only set the DC brightness if I
> plug out the AC power.
Still "set current brightness" operation makes a lot of sense.
Pavel
--
Web maintainer for suspend.sf.net (www.sf.net/projects/suspend) wanted...
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WARNING: multiple messages have this Message-ID (diff)
From: Pavel Machek <pavel@suse.cz>
To: Gabor Gombas <gombasg@sztaki.hu>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>, Greg KH <greg@kroah.com>,
linux-pm@lists.osdl.org, linux-acpi@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [linux-pm] Re: [PATCH, RFC] [1/3] Generic in-kernel AC status
Date: Fri, 10 Feb 2006 13:21:31 +0100 [thread overview]
Message-ID: <20060210122131.GC4974@elf.ucw.cz> (raw)
In-Reply-To: <20060209085344.GF16052@boogie.lpds.sztaki.hu>
On Čt 09-02-06 09:53:44, Gabor Gombas wrote:
> On Wed, Feb 08, 2006 at 05:08:58PM +0000, Matthew Garrett wrote:
>
> > The backlight interface only supports exporting and setting the current
> > brightness. For various bits of hardware, the AC and DC brightnesses are
> > stored separately. Drivers would need to know which brightness value to
> > export to userspace. I have an HP backlight driver here which would
> > benefit from this, and I'm looking at the same issue for a Panasonic
> > one.
>
> I don't know the backlight interface but extending it to export all
> available brightness values would seem more logical to me.
>
> If I'd had a laptop I'd hate if I could only set the DC brightness if I
> plug out the AC power.
Still "set current brightness" operation makes a lot of sense.
Pavel
--
Web maintainer for suspend.sf.net (www.sf.net/projects/suspend) wanted...
next prev parent reply other threads:[~2006-02-10 12:21 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-08 12:57 [PATCH, RFC] [1/3] Generic in-kernel AC status Matthew Garrett
2006-02-08 13:03 ` [PATCH, RFC] [2/3] ACPI support for generic " Matthew Garrett
2006-02-08 13:04 ` [PATCH, RFC] [1/3] Generic " Matthew Garrett
2006-02-08 13:05 ` [PATCH, RFC] [3/3] APM support for generic " Matthew Garrett
2006-02-08 16:58 ` [linux-pm] Re: [PATCH, RFC] [1/3] Generic " Greg KH
2006-02-08 17:08 ` Matthew Garrett
2006-02-08 17:08 ` [linux-pm] " Matthew Garrett
2006-02-08 17:16 ` Greg KH
2006-02-08 17:49 ` Matthew Garrett
2006-02-09 5:46 ` Greg KH
2006-02-09 8:53 ` Gabor Gombas
2006-02-10 12:21 ` Pavel Machek [this message]
2006-02-10 12:21 ` Pavel Machek
2006-02-10 13:13 ` Gabor Gombas
2006-02-10 13:13 ` [linux-pm] " Gabor Gombas
2006-02-10 13:19 ` Matthew Garrett
2006-02-10 13:54 ` Pavel Machek
2006-02-10 13:54 ` Pavel Machek
2006-02-10 13:56 ` Gabor Gombas
2006-02-10 13:56 ` [linux-pm] " Gabor Gombas
2006-02-08 22:25 ` Philipp Matthias Hahn
2006-02-10 12:21 ` Pavel Machek
2006-02-10 8:06 ` Stefan Seyfried
2006-02-10 8:06 ` Stefan Seyfried
2006-02-10 12:19 ` Pavel Machek
2006-02-10 12:19 ` Pavel Machek
2006-02-10 12:32 ` Stefan Seyfried
2006-02-10 12:32 ` Stefan Seyfried
2006-02-10 13:46 ` Pavel Machek
2006-02-10 13:46 ` Pavel Machek
2006-02-12 10:17 ` Jan Engelhardt
2006-02-12 11:27 ` Kyle Moffett
2006-02-14 17:44 ` Thomas Renninger
2006-02-14 17:44 ` Thomas Renninger
2006-02-14 20:17 ` Rafael J. Wysocki
2006-02-14 20:17 ` Rafael J. Wysocki
2006-02-15 12:36 ` Thomas Renninger
2006-02-15 12:36 ` Thomas Renninger
2006-02-15 12:47 ` Matthew Garrett
2006-02-15 12:47 ` Matthew Garrett
2006-02-15 15:04 ` Thomas Renninger
2006-02-16 22:44 ` Pavel Machek
2006-02-16 22:44 ` Pavel Machek
2006-02-16 22:39 ` Pavel Machek
2006-02-16 22:39 ` Pavel Machek
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