[lm-sensors] ATK0110

Luca Tettamanti kronos.it at gmail.com
Fri Oct 2 12:41:43 CEST 2009


On Thu, Oct 1, 2009 at 10:03 PM, Mark Altern <mark.altern at gmail.com> wrote:
> Hi,
>
> Sorry to send you this abrupt email. I just have a quick question about
> asus_atk0110. I am a little frustrated and don't know where else I can ask.

I'm the maintainer of the driver so I'm the right person ;-)
lm-sensors at lm-sensors.org is the appropriate ML.

> I have ASUS p6t with Core i7 920 system, the problem is that asus_atk0110
> report wrong CPU diode temperatures, 47C while in fact is is about 36C, thus
> forcing the CPU fan running more than 1100 rmp during idling. To solve this
> problem I blacklist this module, while instead load w83667hg, which reports
> the right temperature. Then the CPU fan is working correctly. Do you think
> it is safe to do so?

Are you using fancontrol/pwmconfig to control the fan?

> I am just wondering why atk0110 is reporting the wrong values? do you think
> this mis-behavior will be fixed in the future?

It's more likely that w83667hg is reporting the "wrong" value. The
ACPI drivers reports the temperature as reported by system firmware.
It's possible that the firmware is compensating the raw value to give
an estimate of the real CPU temperature (as opposed to the temperature
of a diode sittign somewhere under the socket). In just in case send a
copy of your DSDT (/sys/firmware/acpi/tables/DSDT).
Also take a look at the values reported by coretemp to have an idea of
the real core temperature.

Luca




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