From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Sterratt Subject: Re: Temperature reported wrongly? Date: Fri, 18 Feb 2005 22:00:18 +0000 Message-ID: <1108764018.7311.15.camel@chickenrun> References: <1107531994.23192.2056.camel@canonmills.inf.ed.ac.uk> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit In-Reply-To: <1107531994.23192.2056.camel-n5vp7pYcALv/CiYq7C4egV5eyrv7yTFU@public.gmane.org> 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: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org On Fri, 2005-02-04 at 15:46 +0000, David Sterratt wrote: > There appears to be a discrepancy between the temperature reported by > ACPI and the temperature reported by the "health check" in my BIOS, just > over a minute after rebooting. The value reported by > /proc/acpi/thermal_zone/THRM/temperature is 73 degC as opposed to 51 > degC from the BIOS. I'm working on the assumption that the CPU core > can't cool down by 22 degC in under a minute. > > Is that assumption likely to be correct? If so, I suppose it implies a > bug in acpi, I've looked in the bugzilla and googled, but couldn't find > anything similar. > > I'm running a stock 2.6.8 kernel as supplied by Debian. My motherboard > is an MSI MS-6390 with an Athlon XP1800+ CPU and a winbond W83697HF > sensor chip. The temperature sensor is a diode. The BIOS is AWARD v > 6.00PG (v1.2) and APIC is disabled in the BIOS (to solve some other > problems with 2.6.x kernels). > > I've considered upgrading the BIOS. There was a problem in earlier > versions of the BIOS about reporting incorrect temperature, but that > seems to have been fixed in my minor version (v1.2) > (http://members.driverguide.com/driver/detail.php?driverid=149547) There > are no changes after v1.2 that might correct the temperature reporting > (http://www.msicomputer.com/support/bios_result.asp; and then select AMD > platform and MSI-6390 -- MSI site won't give sane URL). I'm reluctant to > flash my BIOS, but if people think it might be worth a try I might take > the risk. > > I've tried using lm_senosrs, but that gives me the same temperature > (unless I tweak it in sensors.conf). I've just discovered (by accident) that this actually appears to be an lm_sensors problem -- when I don't have the lm_sensors modules in the kernel, ACPI seems to report the CPU temperature fine. I'll mail the relevant lm_sensors list. Sorry for the noise. David. ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click