Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752445AbbBXLDh (ORCPT ); Tue, 24 Feb 2015 06:03:37 -0500 Received: from mail-we0-f172.google.com ([74.125.82.172]:46954 "EHLO mail-we0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751044AbbBXLDf convert rfc822-to-8bit (ORCPT ); Tue, 24 Feb 2015 06:03:35 -0500 MIME-Version: 1.0 In-Reply-To: <1643186.zN49pcFPny@vostro.rjw.lan> References: <1643186.zN49pcFPny@vostro.rjw.lan> Date: Tue, 24 Feb 2015 12:03:33 +0100 Message-ID: Subject: Re: [v3.20]: Missing /sys/class/ACAD directory OR Cannot release Mutex From: =?UTF-8?Q?J=C3=B6rg_Otte?= To: "Rafael J. Wysocki" Cc: Linux Kernel Mailing List , "Rafael J. Wysocki" , Linus Torvalds , ACPI Devel Maling List Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1441 Lines: 35 2015-02-24 0:24 GMT+01:00 Rafael J. Wysocki : > On Sunday, February 22, 2015 01:33:09 PM Jörg Otte wrote: >> Starting with kernel 3.19.0-05184-g18320f2, I often find my notebook >> running with 'powersave' policy even if it is on AC. >> >> It turned out that /sys/class/ACAD directory is missing and in the >> logs I see: >> >> ACPI Error: Cannot release Mutex [MUT0], not acquired (20150204/exmutex-376) >> ACPI Error: Method parse/execution failed [\_SB_.ACAD._PSR] (Node >> ffff880216028d48), AE_AML_MUTEX_NOT_ACQUIRED (20150204/psparse-536) >> ACPI Exception: AE_AML_MUTEX_NOT_ACQUIRED, Error reading AC Adapter >> state (20150204/ac-131) >> >> At the last 25 startups since 3.19.0-05184-g18320f2 it occured 13 times. >> >> It does not occur with kernels older than 3.19.0-05184-g18320f2. > > Which mainline commit is that? 18320f2 Merge tag 'pm+acpi-3.20-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm > > The only changes in 4.0-rc1 that can affect that are the ACPI EC updates IIRC. > > Is there a chance to try the acpi-ec branch from linux-pm.git and see if the > problem is there? Should be no problem. I will give it a try. Thanks, Jörg -- 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/