From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753961Ab1HZMmA (ORCPT ); Fri, 26 Aug 2011 08:42:00 -0400 Received: from smtp04.smtpout.orange.fr ([80.12.242.126]:53237 "EHLO smtp.smtpout.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752521Ab1HZMl7 (ORCPT ); Fri, 26 Aug 2011 08:41:59 -0400 X-Greylist: delayed 479 seconds by postgrey-1.27 at vger.kernel.org; Fri, 26 Aug 2011 08:41:58 EDT X-ME-engine: default Date: Fri, 26 Aug 2011 14:33:58 +0200 From: Bastien Dejean To: Linux Kernel Mailing List Subject: Limited Brightness Values with apple_backlight on an iMac 10,1 Message-ID: <20110826123358.GA13479@circle.home> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Since 2.6.39 I have a /sys/class/backlight/apple_backlight/ interface and I can change the brightness by echoing values to the relevant brightness file. That's great but there's a little problem: On the 256 levels of brightness that my screen supports, I can only reach 16 of the 128 upper values. It means that the lowest brightness I can access on Linux is at 50% of the real maximum brightness. Thanks, -- Bastien