From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?utf-8?Q?Bj=C3=B8rn_Mork?= <bjorn@mork.no>
Subject: Re: ThinkPad T420 : 8 versus 16 brightness level steps
Date: Fri, 28 Feb 2014 09:15:03 +0100
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In-Reply-To: <530F750F.3010806@gmx.de> ("Toralf =?utf-8?Q?F=C3=B6rster=22'?=
 =?utf-8?Q?s?= message of "Thu, 27
	Feb 2014 18:25:35 +0100")
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To: Toralf =?utf-8?Q?F=C3=B6rster?= <toralf.foerster@gmx.de>
Cc: ibm-acpi-devel@lists.sourceforge.net, platform-driver-x86@vger.kernel.org

Toralf F=C3=B6rster <toralf.foerster@gmx.de> writes:

> /'m wondering why under a 64 bit RedHat 6.4 Linux with kernel 2.6.32+=
X
> I do have 16 levels in dimming the display brightness with Fn+Pos1/En=
d
> whereas under a 32 bit Gentoo Linux with recent 3.1x.y kernels I do
> just have 8 steps from min to max.

My guess would be this:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/d=
rivers/platform/x86/thinkpad_acpi.c?id=3D122f26726b5e16174bf8a707df14be=
1d93c49d62



Bj=C3=B8rn