From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261653AbVADOVD (ORCPT ); Tue, 4 Jan 2005 09:21:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261654AbVADOVD (ORCPT ); Tue, 4 Jan 2005 09:21:03 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.31.123]:11999 "EHLO atrey.karlin.mff.cuni.cz") by vger.kernel.org with ESMTP id S261653AbVADOU7 (ORCPT ); Tue, 4 Jan 2005 09:20:59 -0500 Date: Mon, 3 Jan 2005 10:42:46 +0100 From: Pavel Machek To: Georg Schild Cc: linux-kernel@vger.kernel.org Subject: Re: cpu throttling powernow-k8 and acpi in kernel Message-ID: <20050103094245.GD2473@openzaurus.ucw.cz> References: <41D80CAB.1060903@gmx.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <41D80CAB.1060903@gmx.net> User-Agent: Mutt/1.3.27i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > I have an acer aspire 1501 lmi with amd64 @3000+. i am running a > gentoo 64bit dist with vanilla 2.6.10 kernel on it. > > i encounter some problems with the speed throttling of the cpu. this > kind of cpu has 3 steps which a gouvernor can reach, 1800, 1600 and > 800Mhz. i am using the ondemand gouvernor. so far this works quite > good, ondemand puts it at 800 until i do something. as it should be. > i have also CONFIG_ACPI_PROCESSOR=y and CONFIG_ACPI_THERMAL=y > enabled. when acpi thinks the temperature is too high (95 for cpu) > it throttles the cpu down to 800Mhz, no care what ondemand tells it. > okay, why not, is a good protection for overheating. but i don't > think the cpu has 95, i have run the laptop much hotter once, and > there was no downthrottling. it cannot be that i am not able to > compile a simple package without getting a critical temperature. i am > watching the temps in gkrellm and this leads me to the thing that > there is something wrong with it cause it jumps a bit when the temps > are getting higher and one thing more, when the laptop is doing > nothing, e.g. over night, screen is off, cpu is at 800 the temp is > still at about 55 and more, how can that be? but i cannot disable > the two acpi-options mentionend above. at first the cpu runs at 800, > no problem, fan is almost off. but when i start e.g. a compilation > first the fan starts spinning up a bit, the cpu goes to 1800mhz but > after a while the fan gives all the speed it is able to, much noise, > and after one or 2 minutes the laptop switches off immediate. > It seems your machine indeed is overheating. Modern cpus produce a lot of heat. 55C idle temperature seems okay. Open machine and attach your own temperature sensor to cpu to verify... Pavel -- 64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms