From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nils Faerber Subject: Kernel 2.4.23 passive cooling Date: Mon, 01 Dec 2003 19:02:20 +0100 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <1070301739.1353.6.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org Hi! Passive cooling still seems a little strange, at least to me on my Asus L3800C notebook. What happens: - active cooling is perfectly fine and I succesfully use speedstepdaemon to automatically set my CPU to lower performance in idle mode. - passive cooling works until it reaches the first hot state. After that the fan(s) power up for a very short time and the CPU performance is set to maximum (!) again. The performance setting can afterwards not be reset to low performance anymore; it will be reset to high automatically! - Changing back to active cooling restores the machine into a normal "cool" state but still leaves the performance unchangeable. Only fix is to reboot (I have ACPI fix in kernel). So basically for me passive cooling is not usable. I think this is a bug in the hysteresis handling in the thermal zone management. Is there any chance that this will be fixed? Or is this a BIOS bug? CU nils faerber -- kernel concepts Tel: +49-271-771091-12 Dreisbachstr. 24 Fax: +49-271-771091-19 D-57250 Netphen D1 : +49-170-2729106 -- ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. Does SourceForge.net help you be more productive? Does it help you create better code? SHARE THE LOVE, and help us help YOU! Click Here: http://sourceforge.net/donate/