From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-acpi@vger.kernel.org, "Rafael J. Wysocki" <rjw@sisk.pl>
Subject: Re: brightness control on thinkpad t61p
Date: Tue, 8 Jan 2008 00:45:59 +0000 [thread overview]
Message-ID: <20080108004559.GA27177@srcf.ucam.org> (raw)
In-Reply-To: <20080108003246.GA15587@khazad-dum.debian.net>
On Mon, Jan 07, 2008 at 10:32:46PM -0200, Henrique de Moraes Holschuh wrote:
> Should we? Why? We lose information doing that. Instead of a nice linear
> 0-100% brightness scale, you are now back to an 8 or 16-level non-linear
> brightness scale.
The spec makes no guarantees about what that 0-100 range means - it may
be brightness, power consumption or bonghits. It's really not guaranteed
to be meaningful, and the backlight class doesn't provide that guarantee
either.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2008-01-08 0:46 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-23 8:00 brightness control on thinkpad t61p Andrew Morton
2007-12-23 12:16 ` Rafael J. Wysocki
2007-12-24 7:34 ` Matthew Garrett
2007-12-24 17:14 ` Henrique de Moraes Holschuh
2007-12-26 22:10 ` Andrew Morton
2007-12-26 22:23 ` Matthew Garrett
2007-12-27 12:33 ` Henrique de Moraes Holschuh
2008-01-07 1:36 ` Henrique de Moraes Holschuh
2008-01-07 19:48 ` Matthew Garrett
2008-01-08 0:32 ` Henrique de Moraes Holschuh
2008-01-08 0:45 ` Matthew Garrett [this message]
2008-01-08 12:06 ` Henrique de Moraes Holschuh
2008-01-08 12:18 ` Matthew Garrett
2008-01-08 12:48 ` Henrique de Moraes Holschuh
2008-01-08 15:17 ` Matthew Garrett
2008-01-08 15:45 ` Richard Purdie
2008-01-08 15:54 ` Matthew Garrett
2008-01-08 16:29 ` Richard Purdie
2008-01-08 16:49 ` Henrique de Moraes Holschuh
2008-01-08 16:56 ` Richard Purdie
2008-01-08 17:36 ` Henrique de Moraes Holschuh
2007-12-27 12:31 ` Henrique de Moraes Holschuh
2007-12-24 17:08 ` Henrique de Moraes Holschuh
2007-12-26 22:10 ` Andrew Morton
2007-12-27 13:15 ` Henrique de Moraes Holschuh
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