From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Felipe Contreras <felipe.contreras@gmail.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>, Aaron Lu <aaron.lwe@gmail.com>,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
Len Brown <lenb@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [REGRESSION/PATCH] acpi: blacklist win8 OSI for ASUS Zenbok Prime UX31A
Date: Wed, 31 Jul 2013 15:00:10 +0100 [thread overview]
Message-ID: <20130731140010.GA24560@srcf.ucam.org> (raw)
In-Reply-To: <CAMP44s2B=nQLnZm7gyYAJZgt_x3KszRZLUC=fom0t9=Eze+smA@mail.gmail.com>
On Wed, Jul 31, 2013 at 06:32:47AM -0500, Felipe Contreras wrote:
> On Wed, Jul 31, 2013 at 12:14 AM, Matthew Garrett <mjg59@srcf.ucam.org> wrote:
> > There's no mechanism for an OS to know whether or not a firmware
> > implementation will actually turn the backlight off at 0, so there's no
> > way the OS can define the lowest backlight state as anything other than
> > "May or may not turn the screen off".
>
> Yes there is; quirks.
We aren't going to maintain a quirk list in order to support a guarantee
that was never made. "0" as a backlight level has potentially meant
"screen off" since the interface was first introduced.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2013-07-31 14:00 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-29 19:20 [REGRESSION/PATCH] acpi: blacklist win8 OSI for ASUS Zenbok Prime UX31A Felipe Contreras
2013-07-29 20:17 ` Rafael J. Wysocki
2013-07-29 20:22 ` Felipe Contreras
2013-07-29 20:47 ` Rafael J. Wysocki
2013-07-29 21:04 ` Felipe Contreras
2013-07-30 3:11 ` Aaron Lu
2013-07-30 3:44 ` Felipe Contreras
2013-07-30 5:51 ` Aaron Lu
2013-07-30 5:57 ` Aaron Lu
2013-07-30 13:42 ` Rafael J. Wysocki
2013-07-30 20:59 ` Felipe Contreras
2013-07-30 23:13 ` Rafael J. Wysocki
2013-07-31 0:11 ` Felipe Contreras
2013-07-31 1:36 ` Aaron Lu
2013-07-31 2:07 ` Felipe Contreras
2013-07-31 2:22 ` Aaron Lu
2013-08-01 18:50 ` Felipe Contreras
2013-07-31 5:14 ` Matthew Garrett
2013-07-31 11:32 ` Felipe Contreras
2013-07-31 14:00 ` Matthew Garrett [this message]
2013-07-31 17:46 ` Felipe Contreras
2013-07-31 17:52 ` Matthew Garrett
2013-07-31 18:07 ` Felipe Contreras
2013-07-31 18:47 ` Matthew Garrett
2013-08-01 17:37 ` Felipe Contreras
2013-08-01 17:42 ` Matthew Garrett
2013-08-01 17:50 ` Felipe Contreras
2013-08-01 18:01 ` Matthew Garrett
2013-08-01 18:11 ` Felipe Contreras
2013-08-01 23:40 ` Felipe Contreras
2013-07-31 1:59 ` Aaron Lu
2013-07-31 2:09 ` Felipe Contreras
-- strict thread matches above, loose matches on Subject: below --
2013-10-20 22:16 Vincent Blut
2013-10-21 1:53 ` Aaron Lu
2013-10-21 21:21 ` Vincent Blut
2013-10-22 2:16 ` Aaron Lu
2013-10-22 2:12 ` Felipe Contreras
2013-10-23 15:31 ` Matthew Garrett
2013-10-23 19:39 ` Felipe Contreras
2013-10-24 0:53 ` Matthew Garrett
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