[lm-sensors] Interpreting lm-sensors's output
monnier at iro.umontreal.ca
Fri Mar 2 21:27:57 CET 2012
>> OT1H the "high=70" and "crit=100" would seem to give me the answer, but
>> OTOH I don't know whether I can trust them (actually, I hope some of
>> the output is "wrong" since the sensor readings go up routinely to 80°
>> during long compilations).
> They are correct and you should trust them. If you reach 80°C then you
> probably need better thermal dissipation or a different CPU / graphics
> power management strategy.
The thing that puzzles me is that this low-power mini-ITX board (fanless
Brazos E350) is in a full-size ATX chassis (Antec Sonata) which
previously held an high-power Athlon X2 board (first with the stock
AMD heatsink+fan, and then later with a monster fanless heatsink), so
I have a hard time understanding how this low-power board can heat up
worse than the other one in the exact same context (same chassis,
power-supply, devices, system fan spinning at the same speed, ...).
The Athlon X2 barely reached 70°C in the hottest part of the summer,
under full load.
> BTW, you may have other (unsupported) sensors on the board... Give a
> try to http://dl.lm-sensors.org/lm-sensors/files/sensors-detect
> and report the full output.
OK, I finally added "acpi_enforce_resources=lax" and loaded the it87
module, which does give me a bit more data:
Adapter: PCI adapter
temp1: +51.6°C (high = +70.0°C)
(crit = +100.0°C, hyst = +97.0°C)
Adapter: PCI adapter
Adapter: ISA adapter
in0: +3.06 V (min = +1.46 V, max = +1.98 V) ALARM
in1: +1.07 V (min = +0.00 V, max = +1.52 V)
in2: +2.23 V (min = +0.00 V, max = +1.52 V) ALARM
in3: +0.01 V (min = +0.00 V, max = +1.52 V)
in4: +1.02 V (min = +1.09 V, max = +0.83 V) ALARM
in5: +1.52 V (min = +1.31 V, max = +0.78 V) ALARM
in6: +1.12 V (min = +1.69 V, max = +2.69 V) ALARM
3VSB: +3.26 V (min = +0.00 V, max = +3.05 V) ALARM
Vbat: +3.24 V
fan1: 0 RPM (min = 20 RPM) ALARM
fan2: 0 RPM (min = 20 RPM) ALARM
temp1: +30.0°C (low = +0.0°C, high = +127.0°C) sensor = thermal diode
temp2: -128.0°C (low = +13.0°C, high = -18.0°C) sensor = disabled
temp3: -128.0°C (low = -67.0°C, high = -3.0°C) sensor = disabled
So I guess the it87 "temp1" is a "motherboard" sensor. This one always
stays much lower than the other two sensors.
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