From owner-freebsd-questions@FreeBSD.ORG Thu Jul 17 18:26:54 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 5C8B4E39 for ; Thu, 17 Jul 2014 18:26:54 +0000 (UTC) Received: from mail-la0-f42.google.com (mail-la0-f42.google.com [209.85.215.42]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id D9BE122A3 for ; Thu, 17 Jul 2014 18:26:53 +0000 (UTC) Received: by mail-la0-f42.google.com with SMTP id pv20so1547733lab.1 for ; Thu, 17 Jul 2014 11:26:45 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=lTyvLbaRllwjEkwYWd/4yJEXmqMF11hXcZn6EUM9V8o=; b=gJDQAwgpBQwmUyFNcD/bzNWwpEM+T20WFUz0V+t+KjLDfDTYypN8HpgWnuorzoMfnc 4J8GK4bEabMNZuBPVm90UTBpy9cIQmxmOcP9PoRzlD/AviAEW5nU1SJelSFZLgUSCc6v Pp4lGj7INRbPciRVaExutQzvkke+4Yrf1MYXUSJOre58GswsdFyjajLqt8vmDmLRR3+b WYRn3riImrhD+PnJNgiQD9hjx9IcNbEQibOcVQMTmkKnfu5f5TLYt+BaXiGYiUROnkYE kqDvgS30wfHCD0M2JfZI7JGn0yAtB8+C5VauAfshNNxmBFb7dbFK6JXlUAV7cTITlh5l 53Dg== X-Gm-Message-State: ALoCoQkOlSfmPUw/94Dr2ED+RIFIaLguxE6cHW7YUw91I6hWGNDxUmWeeh+97WZPjRTMbZbtI7ZY MIME-Version: 1.0 X-Received: by 10.112.13.4 with SMTP id d4mr33360004lbc.50.1405621184954; Thu, 17 Jul 2014 11:19:44 -0700 (PDT) Received: by 10.114.62.209 with HTTP; Thu, 17 Jul 2014 11:19:44 -0700 (PDT) In-Reply-To: <20140717135458.6c3a58d14732798685660928@3dresearch.com> References: <20140717135458.6c3a58d14732798685660928@3dresearch.com> Date: Thu, 17 Jul 2014 14:19:44 -0400 Message-ID: Subject: Re: CPU temperature reading From: Antoine Kallab To: Janos Dohanics Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18 Cc: FreeBSD Questions X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Jul 2014 18:26:54 -0000 On Thu, Jul 17, 2014 at 1:54 PM, Janos Dohanics wrote: > Hello, > > I am getting impossibly low temperature readings on a new system > running FreeBSD 10.0-STABLE #0 r268555 amd64: > > # sysctl -a | grep amdtemp > dev.amdtemp.%parent: > dev.amdtemp.0.%desc: AMD CPU On-Die Thermal Sensors > dev.amdtemp.0.%driver: amdtemp > dev.amdtemp.0.%location: > dev.amdtemp.0.%pnpinfo: > dev.amdtemp.0.%parent: hostb4 > dev.amdtemp.0.sensor_offset: 0 > dev.amdtemp.0.core0.sensor0: 17.2C > dev.amdtemp.1.%desc: AMD CPU On-Die Thermal Sensors > dev.amdtemp.1.%driver: amdtemp > dev.amdtemp.1.%location: > dev.amdtemp.1.%pnpinfo: > dev.amdtemp.1.%parent: hostb10 > dev.amdtemp.1.sensor_offset: 0 > dev.amdtemp.1.core0.sensor0: 19.1C > > The BIOS only says CPU temp "Low". > > Smartctl shows 30C for hard drive temperatures. The ambient temp in the > room is about 24C - defective CPU thermal sensors? > Most likely. Here's a temporary fix: Have you ever recorded your CPU temperature and load before? If so, compare the load averages with then and now, and set the sensor offset, so the readings match the temperatures.