From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268878AbUHLW5j (ORCPT ); Thu, 12 Aug 2004 18:57:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268871AbUHLWyw (ORCPT ); Thu, 12 Aug 2004 18:54:52 -0400 Received: from fmr02.intel.com ([192.55.52.25]:46282 "EHLO caduceus.fm.intel.com") by vger.kernel.org with ESMTP id S268859AbUHLWyD (ORCPT ); Thu, 12 Aug 2004 18:54:03 -0400 Subject: Re: [ACPI] Re: Allow userspace do something special on overtemp From: Len Brown To: stefandoesinger@gmx.at Cc: ACPI Developers , Pavel Machek , trenn@suse.de, seife@suse.de, Kernel Mailing List In-Reply-To: <200408121927.11277.stefandoesinger@gmx.at> References: <20040811085326.GA11765@elf.ucw.cz> <1092323945.5028.177.camel@dhcppc4> <200408121927.11277.stefandoesinger@gmx.at> Content-Type: text/plain; charset=ISO-8859-1 Organization: Message-Id: <1092351206.5021.201.camel@dhcppc4> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.3 Date: 12 Aug 2004 18:53:27 -0400 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2004-08-12 at 13:27, Stefan Dösinger wrote: > Hi, > Isn't this a little bit dangerous? What if acpid is not set up to > handle this? > There are two levels of hardware thermal control that will kick in -- TM1 and TM2, and if they fail the hardware will turn itself off. Speaking for Intel processors only. The reason is that the hardware needs to handle this case where the OS crashes while in ACPI mode and is unable to do any thermal control itself. cheers, -Len