From mboxrd@z Thu Jan 1 00:00:00 1970 From: Len Brown Subject: Re: [intel/acpi] backlight Date: Sun, 30 Nov 2008 22:28:30 -0500 (EST) Message-ID: References: <1227854824.3477.9.camel@hidalgo> <1228093715.4035.87.camel@yakui_zhao.sh.intel.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Return-path: Received: from vms173001pub.verizon.net ([206.46.173.1]:64753 "EHLO vms173001pub.verizon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751499AbYLAD2d (ORCPT ); Sun, 30 Nov 2008 22:28:33 -0500 Received: from localhost.localdomain ([96.237.168.40]) by vms173001.mailsrvcs.net (Sun Java System Messaging Server 6.2-6.01 (built Apr 3 2006)) with ESMTPA id <0KB6009GGHNJHQ07@vms173001.mailsrvcs.net> for linux-acpi@vger.kernel.org; Sun, 30 Nov 2008 21:28:32 -0600 (CST) In-reply-to: <1228093715.4035.87.camel@yakui_zhao.sh.intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Zhao Yakui Cc: Yves-Alexis Perez , "linux-acpi@vger.kernel.org" On Mon, 1 Dec 2008, Zhao Yakui wrote: > On Fri, 2008-11-28 at 14:47 +0800, Yves-Alexis Perez wrote: > > Hi, > > > > I'm running linux 2.6.28-rc6-00007-ged31348 on my Thinkpad T61, with > > Intel GM965. Under X, brightness keys work fine most of the time, but in > > some case it fails (for example after a dpms force off, but not always). > > Switching to console and back to X fix the problem for a time. > Will you please confirm whether the issue still exists if DPMS is not > used? I don't have DPMS enabled, and if editing xorg.conf is required to enable it, I never will. > > Another weird stuff is that, in single user, I have no way to control > > the backlight. Using brightness key doesn't work, > > and /sys/class/backlight/acpi_video0 doesn't do anything. > Can you confirm whether the i915 driver is loaded in single user mode? > If not, please load it and see whether the interface > of /sys/class/backlight/* can work. In 2.6.28... in single user mode, i915 is not loaded, /sys/class/backlight/acpi_video0 does NOT work modprobe of i915 does not change this. In 2.6.27 in single user mode, i915 is not loaded, /sys/class/backlight/acpi_video0 does NOT work /sys/class/backlight/acpi_video1 DOES work modprobe of i915 does not change this. -Len