Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753273AbbBWXAz (ORCPT ); Mon, 23 Feb 2015 18:00:55 -0500 Received: from v094114.home.net.pl ([79.96.170.134]:56350 "HELO v094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752120AbbBWXAy convert rfc822-to-8bit (ORCPT ); Mon, 23 Feb 2015 18:00:54 -0500 From: "Rafael J. Wysocki" To: =?ISO-8859-1?Q?J=F6rg?= Otte Cc: Linux Kernel Mailing List , "Rafael J. Wysocki" , Linus Torvalds , ACPI Devel Maling List Subject: Re: [v3.20]: Missing /sys/class/ACAD directory OR Cannot release Mutex Date: Tue, 24 Feb 2015 00:24:16 +0100 Message-ID: <1643186.zN49pcFPny@vostro.rjw.lan> User-Agent: KMail/4.11.5 (Linux/3.19.0+; KDE/4.11.5; x86_64; ; ) In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT 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: 1197 Lines: 31 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? 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? Rafael -- 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/