From mboxrd@z Thu Jan 1 00:00:00 1970 From: Len Brown Subject: Re: Thermal Zones and Throttling Date: Tue, 17 Apr 2007 23:03:46 -0400 Message-ID: <200704172303.46321.lenb@kernel.org> References: <11b141710704121410j16011387q4640f07f1e27a85f@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:53704 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965427AbXDRDFO (ORCPT ); Tue, 17 Apr 2007 23:05:14 -0400 In-Reply-To: <11b141710704121410j16011387q4640f07f1e27a85f@mail.gmail.com> Content-Disposition: inline Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Paulo J. Matos" Cc: linux-acpi@vger.kernel.org On Thursday 12 April 2007 17:10, Paulo J. Matos wrote: > Hello, > > I'm almost sure by laptop is burning [almost] and yet, no throttling > change is happening. > The only wierd thing I can find is the fact that: > euler ~ # cat /proc/acpi/processor/CPU0/info > processor id: 0 > acpi id: 0 > bus mastering control: yes > power management: yes > throttling control: yes > limit interface: yes > euler ~ # cat /proc/acpi/processor/CPU0/throttling > state count: 4 > active state: T0 > states: > *T0: 00% > T1: 25% > T2: 50% > T3: 75% > euler ~ # ls -la /proc/acpi/thermal_zone/ > total 0 > dr-xr-xr-x 2 root root 0 Apr 12 22:07 . > dr-xr-xr-x 10 root root 0 Apr 12 15:26 .. > > Isn't it wierd that although I have throttling control, there are no > thermal zones? > > I'm almost sure throttling should be activated... my laptop is > practically burning my hands as I write this.... Is there anything I > can check out? Cat /proc/cpuinfo will tell if the hardware has automatic throttling for thermal emergencies. However, the real question is why you're having a thermal emergency in the first place. Is there dust blocking the fan? -Len