From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?iso-8859-1?Q?S=E9bastien?= Hinderer Subject: Buggy DSDT on Dell Latitude E5400 Date: Sun, 14 Dec 2008 03:21:25 +0100 Message-ID: <20081214022125.GA29259@zen> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail1-relais-roc.national.inria.fr ([192.134.164.82]:64340 "EHLO mail1-relais-roc.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751794AbYLNCct (ORCPT ); Sat, 13 Dec 2008 21:32:49 -0500 Received: from seb by zen.loria.fr with local (Exim 4.69) (envelope-from ) id 1LBgbl-0007cJ-Ms for linux-acpi@vger.kernel.org; Sun, 14 Dec 2008 03:21:25 +0100 Content-Disposition: inline Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Dear all, On a recently bought Dell Latitude E5400 laptop with Debian unstable installed, the fan is constantly working. This happens although the temperature reported by acpi -v is around 30 degrees Celcius, and although top reports a CPU usage around 1%. Moreover, when the installed Windows XP is started and the machine is left untouched, the fan remains turned off all the time. Are these symptoms the consequence of a buggy DSDT which Windows overrides ? In that case, how can the problem be fixed ? Is it necessary to disassemble and study the DSDT, or is it possible to somehow fetch the working one presumably used by Windows XP ? Any help / suggestion warmly appreciated. Kind regards, Sebastien.