From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1GTemp-0003XH-Hm for garchives@archives.gentoo.org; Sat, 30 Sep 2006 13:21:47 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.13.8/8.13.6) with SMTP id k8UDJwOF019006; Sat, 30 Sep 2006 13:19:58 GMT Received: from nf-out-0910.google.com (nf-out-0910.google.com [64.233.182.184]) by robin.gentoo.org (8.13.8/8.13.6) with ESMTP id k8UDDpUh002740 for ; Sat, 30 Sep 2006 13:13:51 GMT Received: by nf-out-0910.google.com with SMTP id n15so1271307nfc for ; Sat, 30 Sep 2006 06:13:51 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=NCGQuQZHjJM3tCwnSf/nxp98+aGGS5MxZjqnAoVwrAfVuBzXzriOXYuSqXfiueP2eFRAevv4mgPeauC1Ok3cNXnWt2YkO9UPU0ZVye+n3VgnV6CmmFFh2lIiUVxG2iBvgReaiMWBTLvpMrhRhFt2N61/C5TVqcoEmQC+iucvCqY= Received: by 10.48.210.20 with SMTP id i20mr6618576nfg; Sat, 30 Sep 2006 06:13:51 -0700 (PDT) Received: by 10.49.23.15 with HTTP; Sat, 30 Sep 2006 06:13:51 -0700 (PDT) Message-ID: <342e1090609300613x2a7e52aeoc9a4f4aeae8eda31@mail.gmail.com> Date: Sat, 30 Sep 2006 10:13:51 -0300 From: "Daniel da Veiga" To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] [OT overheat] How to cause shutdown on overheat In-Reply-To: <87r6xtmtwf.fsf@newsguy.com> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <87r6xtmtwf.fsf@newsguy.com> X-Archives-Salt: bf2b414c-af9d-4d1e-9f1f-2188167f559e X-Archives-Hash: 3be71c3a55a95df6bb85dec8c59bc3f0 On 9/30/06, reader@newsguy.com wrote: > Group, I recently built a ventilated stucture around my 4 desktops to > try to quiet things down and get rid of the heat. > > I made no provision for forced shutdown in case of overheat, which is > quite likely to happen if, for example the main ventilation fan went > down for some reason. > > Well, that happened due to stupidity on my part with getting used to > the new setup. I fired up a computer and neglected to turn the fan > on. Then left it running overnight. > > Well, given the confined space and very little/no ventilation (of my > homemade structure) the computer got hot... > > Sometime this morning I see syslog messages written to tty that say: > > Message from syslogd@reader at Sat Sep 30 04:41:32 2006 ... > reader kernel: CPU0: Temperature above threshold > > Message from syslogd@reader at Sat Sep 30 04:41:32 2006 ... > reader kernel: CPU0: Running in modulated clock mode > > [...] > > Some kind of attempt by kernel to cool things down. But will it > actually shutdown if it gets dangerously hot? > > Further, how can I discover what temperatures were involved when this > happened? > > Or can I set something to make a shutdown happen at a specific > temperature? > > A nicer solution would be somekind of added stand alone temperature > monitor in the enclosure that causes a controlled shutdown like one > gets with `shutdown -h now'. > > Anyone here with some experience in this kind of thing that can steer me > to some good information? > If you have built your kernel with ACPI options for THERMAL or some kind of frequency changer, you can use a daemon like cpufreqd to monitor the temperature and take actions like reduce the clock and voltage to avoid damage to the processor. http://www.gentoo.org/doc/en/power-management-guide.xml When my computer reaches the limit (wich in my case is 73 degrees C) it automatically shutdown, I didn't have to configure anything, it is builtin with the thermal ACPI module. I'm talking about a Pentium IV Northwood here, and they tend to get really hot. It used to happen to my Athlon XP also... To monitor the temperature, you can read the /proc entries created by ACPI, for example /proc/acpi/thermal/TZ0/info. -- Daniel da Veiga Computer Operator - RS - Brazil -----BEGIN GEEK CODE BLOCK----- Version: 3.1 GCM/IT/P/O d-? s:- a? C++$ UBLA++ P+ L++ E--- W+++$ N o+ K- w O M- V- PS PE Y PGP- t+ 5 X+++ R+* tv b+ DI+++ D+ G+ e h+ r+ y++ ------END GEEK CODE BLOCK------ -- gentoo-user@gentoo.org mailing list