Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934435Ab3GWXzs (ORCPT ); Tue, 23 Jul 2013 19:55:48 -0400 Received: from hydra.sisk.pl ([212.160.235.94]:36637 "EHLO hydra.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934085Ab3GWXzr (ORCPT ); Tue, 23 Jul 2013 19:55:47 -0400 From: "Rafael J. Wysocki" To: Kamal Mostafa , James Hogan , Steven Newbury , Martin Steigerwald , =?ISO-8859-1?Q?J=F6rg?= Otte Cc: Linus Torvalds , Linux Kernel Mailing List , Matthew Garrett , "Rafael J. Wysocki" , ACPI Devel Maling List Subject: Re: Linux 3.11-rc2 (acpi backlight) Date: Wed, 24 Jul 2013 02:05:48 +0200 Message-ID: <1657635.t6GA9ja9Ss@vostro.rjw.lan> User-Agent: KMail/4.9.5 (Linux/3.10.0+; KDE/4.9.5; x86_64; ; ) In-Reply-To: <1374605189.31029.25.camel@fourier> References: <9012759.Alzqtdvh5b@vostro.rjw.lan> <1374605189.31029.25.camel@fourier> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1663 Lines: 51 On Tuesday, July 23, 2013 11:46:29 AM Kamal Mostafa wrote: > On Mon, 2013-07-22 at 21:54 +0200, Rafael J. Wysocki wrote: > > On Monday, July 22, 2013 11:11:54 AM Linus Torvalds wrote: > > > On Mon, Jul 22, 2013 at 6:02 AM, Rafael J. Wysocki wrote: > > > > > > > > Linus, do you want me to send a pull request reverting 8c5bd7a and efaa14c? > > > > > > Yes, but [...] I'd suggest doing the revert just in time for > > > rc3, but waiting until then to gather info about people who see > > > breakage. > > > > > > Sound like a plan? > > > > Yes, it does. > > > > Rafael > > > Hi Rafael- > > For your reference... > > As James Hogan reported, those ACPI changes break backlight control on > the "Dell XPS13" Ivy Bridge models (the Sandy Bridge XPS13 model is not > affected). > > I confirm that reverting 8c5bd7a and efaa14c fixes it again. Thanks! I'd like to collect some information on the systems having problems with those two commits (to see if they are similar somehow). It seems that one common symptom is that brightness cannot be controlled through function keys. Is that correct for all of you? If so, did you try any other way to control brightness, like a GUI-based? Also, can you all please send me (a) the output of dmidecode and (b) the contents of /proc/cpuinfo from your systems? Rafael -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/