Re: [lm-sensors] does lm-sensors pick up sensors that don't exist?

[Per Jessen <per@computer.org>]

Jean Delvare wrote:

> Depends on the thermal sensor type. For thermal diodes (or
> diode-connected transistors) the chip can typically detect if the
> thermal sensor is missing, and it will report it either explicitly in
> a status register, or through an arbitrary value (typically -128 or
> +127).
> 
> For thermistors, what the chip measures is actually a voltage, which
> is then converted to a temperature value. If the board manufacturer
> doesn't want to implement a sensor, they will typically wire the input
> to the ground, which is equivalent to an infinitely high or infinitely
> low temperature (depending on how the voltage divisor bridge is
> built), and the chip doesn't have to treat this as a special case.
> Things get bad when the manufacturer leave the thermal input floating,
> you will get random temperatures. This is quite possibly what Per is
> experiencing.

Hi Jean

if only I was getting random readings, but the readout I'm seeing
doesn't look random at all - it's typically 80-81, but will increase to
86 when I'm stressing the system (the CPU-temp will rise to 62/63 at
the same time).  

I'm currently waiting for the board to be replaced, so I can't tell you
exactly what lm-sensors says about the type of sensor, but I think it
said it was "transistor". 

Regardless, I guess I should be ignoring it when Gigabyte says it's not
there ...



/Per Jessen, Zürich


_______________________________________________
lm-sensors mailing list
lm-sensors@lm-sensors.org
http://lists.lm-sensors.org/mailman/listinfo/lm-sensors