Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753399Ab0LFBdq (ORCPT ); Sun, 5 Dec 2010 20:33:46 -0500 Received: from mga11.intel.com ([192.55.52.93]:29473 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752845Ab0LFBdp (ORCPT ); Sun, 5 Dec 2010 20:33:45 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.59,303,1288594800"; d="scan'208";a="864794499" Subject: Re: [Regression] 2.6.37-rc1: Lenovo T61 mute button does not work From: Lin Ming To: Lukas Hejtmanek Cc: "Moore, Robert" , "Brown, Len" , Calvin Walton , "linux-kernel@vger.kernel.org" In-Reply-To: <20101203141358.GA6936@ics.muni.cz> References: <20101130185303.GI10354@ics.muni.cz> <1291172324.14274.33.camel@nayuki> <20101203141358.GA6936@ics.muni.cz> Content-Type: text/plain; charset="UTF-8" Date: Mon, 06 Dec 2010 09:37:04 +0800 Message-ID: <1291599424.3688.0.camel@minggr.sh.intel.com> Mime-Version: 1.0 X-Mailer: Evolution 2.30.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1386 Lines: 39 On Fri, 2010-12-03 at 22:13 +0800, Lukas Hejtmanek wrote: > Hi, > > On Tue, Nov 30, 2010 at 09:58:44PM -0500, Calvin Walton wrote: > > > in 2.6.36, mute button worked as expected on my ThinkPad T61 - it toggled > > > mute with mixer applet notification. In 2.6.37-rc1, it only mutes without any > > > event to any mixer applet. > > [...] > > > By default on this series of laptops, Linux runs with the ACPI > > _OSI(Linux) exported - when the bios of this laptop model sees that it's > > running on Linux, it disables the hardware mute functionality and the > > mute button acts as a standard keyboard key. > > > > Search your dmesg for lines containing '_OSI(Linux)' - it should say > > that a BIOS query was honoured. Make sure you do not have 'acpi_osi="! > > Linux"' on your kernel command line. > > The breaking commit is this one: b0ed7a915abac309fcb5a51bccd3782e3daa7417 > > This changes > [ 0.200241] ACPI: BIOS _OSI(Linux) query honored via DMI > to > [ 0.200241] ACPI: BIOS _OSI(Linux) query honored via cmdline > > which apparently does not work with Lenovo T61. I'm looking at this regression. Thanks, Lin Ming -- 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/