From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" 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> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: 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 In-Reply-To: Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: =?ISO-8859-1?Q?J=F6rg?= Otte Cc: Linux Kernel Mailing List , "Rafael J. Wysocki" , Linus Torvalds , ACPI Devel Maling List On Sunday, February 22, 2015 01:33:09 PM J=C3=B6rg 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. >=20 > It turned out that /sys/class/ACAD directory is missing and in the > logs I see: >=20 > ACPI Error: Cannot release Mutex [MUT0], not acquired (20150204/exmut= ex-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) >=20 > At the last 25 startups since 3.19.0-05184-g18320f2 it occured 13 tim= es. >=20 > 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 update= s IIRC. Is there a chance to try the acpi-ec branch from linux-pm.git and see i= f the problem is there? Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html