From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Edmund Rhudy" Subject: RE: Overheating is *not* dangerous Re: Changing temperature trip points Date: Sun, 3 Nov 2002 17:26:24 -0500 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <000501c28388$0b348f20$c200a8c0@pikachu> References: <20021103221945.GH28704@atrey.karlin.mff.cuni.cz> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20021103221945.GH28704-jyMamyUUXNJG4ohzP4jBZS1Fcj925eT/@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: 'Pavel Machek' , 'Dominik Brodowski' Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org The point that I, and it would seem Dominik too, am trying to make is that you can't always rely on this sort of stuff. My laptop didn't shut down when it was in danger, and it doesn't have any sort of throttling safeguard, nor is there anything that can be changed in the BIOS. My desktop allows you to set a shutdown temperature, but by default it's left blank, so the system would happily slag itself unless there is direct user intervention. User intervention is not guaranteed, nor is a nicely behaved BIOS that watches for this sort of thing. -----Original Message----- From: Pavel Machek [mailto:pavel-+ZI9xUNit7I@public.gmane.org] Sent: Sunday, 3 November 2002 5:20 PM To: Dominik Brodowski Cc: Edmund Rhudy; acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Subject: Overheating is *not* dangerous Re: [ACPI] Changing temperature trip points Hi! > > Actually, Documentation/acpi/processor.txt seems like right place. > > "Polling" warning should be in Documentation/, really. > > Which does not exist ==> extremely dangerous situation. Even though > you should know what you're doing when you meddle with the affairs of > kernels, kernels should try at least to some extent to be safe to use. So perhaps its good time to create Documentation/acpi? ;-). Anyway it is not *dangerous* situation. ACPI machines power down on overtemp. Pavel, who forced his toshiba satellite to 95Celsius CPU temp to see how it behaves, and who has hp omnibook xe3 with broken cpu fan and 900mhz athlon. Yes I have seen emergency shutdowns many time already. [BTW toshiba is designed properly, and even without fan is able to passively cool itself by going from 300MHz to 40Mhz. Omnibook is broken and its thermal throttling is not capable of keeping CPU cool enough. What is worse, in some cases omnibook cpu makes harddisk hot (while cpu is in limit and machine does not do emergency poweroff), leading to bad things (tm).] -- Casualities in World Trade Center: ~3k dead inside the building, cryptography in U.S.A. and free speech in Czech Republic. ------------------------------------------------------- This SF.net email is sponsored by: ApacheCon, November 18-21 in Las Vegas (supported by COMDEX), the only Apache event to be fully supported by the ASF. http://www.apachecon.com