From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263149AbTJKPwO (ORCPT ); Sat, 11 Oct 2003 11:52:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263166AbTJKPwO (ORCPT ); Sat, 11 Oct 2003 11:52:14 -0400 Received: from mail.gmx.de ([213.165.64.20]:51357 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S263149AbTJKPwM (ORCPT ); Sat, 11 Oct 2003 11:52:12 -0400 X-Authenticated: #7204266 Date: Sat, 11 Oct 2003 16:52:24 +0100 To: "linux-kernel@vger.kernel.org" Subject: How can I trace ACPI events? From: Martin Aspeli Content-Type: text/plain; charset=US-ASCII; format=flowed MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-ID: User-Agent: Opera7.20/Win32 M2 build 3144 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello, I'm having trouble with ACPI on my Centrino notebook; if ACPI is disabled, a lot of my PCI devices (e.g. onboard sound) don't get any IRQ. If ACPI is enabled, the system boots fine, but about a minute after startup, for no obvious reason keventd ("events/0", PID 3) starts chewing 99.9% CPU and the fan starts spinning at maximum. This is with 2.6.0-test7, although I've had the same problem in all kernels I've tried on this box (from 2.4.22-ac through from 2.6.0-test5 to -test7). Chris Wright suggested runaway ACPI events could cause events/0 to chew CPU, which seems consistent with what I'm seeing here. If I am to diagnose it further, though, I'll have to figure out what ACPI events (if any) are causing the massive spikes in CPU usage. How can I trace this? I've had acpid running, but the log in /var/log/acpid only shows simple messages (started service, registered 1 rule). Nothing particularly interesting from dmesg or TTY 12, either. CC'd replies would be appreciated. Thanks, Martin