From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Francisco Figueiredo Jr." Subject: Re: [PATCH] hysteresis for active cooling Date: Sun, 24 Jul 2005 01:21:37 -0300 Message-ID: <42E31751.4080802@yahoo.com.br> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Sanjoy Mahajan Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Sanjoy Mahajan wrote: > My laptop's fan was turning on and off as the temperature crossed the > active trip point. The patch below adds hysteresis: It turns off active > cooling only when the temperature falls, say, 2 C below the trip point. > Maybe the magic difference should be 5 degrees; I'd be curious what > setting suits people best. > Hi Sanjoy. How do I know what temperature active cooling will be turned off? Currently as I type that, my system starts active cooling when it reaches 52 C and turns off when it reaches 44. I have the following as my trip_points: cat /proc/acpi/thermal_zone/THRM/trip_points critical (S5): 93 C passive: 90 C: tc1=2 tc2=3 tsp=100 devices=0xdf6de280 active[0]: 70 C: devices=0xc147de20 active[1]: 60 C: devices=0xc147df40 active[2]: 50 C: devices=0xc147d120 In my system, what your patch would do? Will it turn off fan when it reach 42, instead of actual 44? Thanks in advance. And sorry for boring you with these questions. I'm very interested in fan management in my laptop, since I had a challenge of knowing how to turn it on and off manually :) - -- Regards, Francisco Figueiredo Jr. Npgsql Lead Developer http://gborg.postgresql.org/project/npgsql MonoBrasil Project Founder Member http://monobrasil.softwarelivre.org - ------------- "Science without religion is lame; religion without science is blind." ~ Albert Einstein -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iQEVAwUBQuMXUf7iFmsNzeXfAQKEMAf+OEVWUHpkgczonoRTn3KX7IOXv3lDjdVz 25DsFSR7lcMQ6t+6AzX1x1eN8IPtd8jPo2n0uE8Q66t/TNY/7ERtqxpqnDiGLPYr p7rXR+BfG3in/ZGdqKOclnfDhEVQLy8LLuyARRwVAlVdbnPeOjLRNkUZ2ElQNKW8 C/IUU7MzkrmtYutfQZRrwOS/rWA+o2GmnNtGQFTgNDhIM4H3ZnT6Kwt74Ramfsd2 mXJM9iq7AlBZxwQUBp3nSwVVYUfUX7NX/lPaOIdi7Fx2F3cYCEa+4ww9kUuW2uhs 9RF29dJf9vAflfrtKzWODU/aAukYTCawqkPxMOcLusodEFPS4k5lbg== =ulkU -----END PGP SIGNATURE----- _______________________________________________________ Yahoo! Acesso Grátis - Internet rápida e grátis. Instale o discador agora! http://br.acesso.yahoo.com/ ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click