Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752295AbbBVMdP (ORCPT ); Sun, 22 Feb 2015 07:33:15 -0500 Received: from mail-wg0-f52.google.com ([74.125.82.52]:55328 "EHLO mail-wg0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751977AbbBVMdL convert rfc822-to-8bit (ORCPT ); Sun, 22 Feb 2015 07:33:11 -0500 MIME-Version: 1.0 Date: Sun, 22 Feb 2015 13:33:09 +0100 Message-ID: Subject: [v3.20]: Missing /sys/class/ACAD directory OR Cannot release Mutex From: =?UTF-8?Q?J=C3=B6rg_Otte?= To: 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: 906 Lines: 22 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. 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/