Does anyone understand the output of "sensors"
under the lm-sensors program?
I've been having heat problems with x86_64 Fedora 6
on an Athlon 64 machine (Asus K8V-F motherboard).
The machine runs perfectly under Windows XP and i386 Fedora,
but crashes repeatedly under x86_64 Fedora.
I've come to the pretty firm conclusion
that this is due to overheating,
so I've installed lm-sensors to check the temperature.
Unfortunately I find the output completely incomprehensible,
and none of the documentation I have seen helps much.
Here is the output (under i386 Fedora):
------------------------------------
[tim@blanche ~]$ sensors
w83697hf-isa-0290
Adapter: ISA adapter
VCore: +1.50 V (min = +1.71 V, max = +1.89 V) ALARM
+3.3V: +3.34 V (min = +3.14 V, max = +3.47 V)
+5V: +5.03 V (min = +4.76 V, max = +5.24 V)
+12V: +11.07 V (min = +10.82 V, max = +13.19 V)
-12V: +0.14 V (min = -13.18 V, max = -10.80 V) ALARM
-5V: +5.10 V (min = -5.25 V, max = -4.75 V) ALARM
V5SB: +5.64 V (min = +4.76 V, max = +5.24 V) ALARM
VBat: +0.00 V (min = +2.40 V, max = +3.60 V) ALARM
fan1: 0 RPM (min = 44 RPM, div = 128) ALARM
fan2: 1486 RPM (min = 1506 RPM, div = 4) ALARM
temp1: +23°C (high = +21°C, hyst = -72°C) sensor = thermistor
ALARM
temp2: +38.0°C (high = +80°C, hyst = +75°C) sensor = thermistor
alarms:
beep_enable:
Sound alarm enabled
------------------------------------
At first sight all those ALARMs seem somewhat frightening,
but then I ran sensors on two machines (PIII and AMD Sempron)
which seem to have no problems,
and I found a number of ALARMs reported there too:
------------------------------------
[tim@alfred ~]$ sensors
w83781d-i2c-0-2d
Adapter: SMBus PIIX4 adapter at e800
VCore 1: +1.98 V (min = +1.94 V, max = +2.14 V)
VCore 2: +1.47 V (min = +1.94 V, max = +2.14 V) ALARM
+3.3V: +3.50 V (min = +3.14 V, max = +3.46 V) ALARM
+5V: +4.78 V (min = +4.73 V, max = +5.24 V)
+12V: +11.86 V (min = +11.37 V, max = +12.59 V)
-12V: -11.74 V (min = -12.57 V, max = -11.35 V)
-5V: -5.06 V (min = -5.25 V, max = -4.74 V)
fan1: 0 RPM (min = 8437 RPM, div = 4) ALARM
fan2: 4017 RPM (min = 3924 RPM, div = 4)
fan3: 0 RPM (min = 2689 RPM, div = 2) ALARM
temp1: +27°C (high = -82°C, hyst = +13°C)
temp2: -48.0°C (high = +70°C, hyst = +60°C)
temp3: +29.5°C (high = +80°C, hyst = +75°C)
vid: +2.050 V (VRM Version 8.2)
alarms:
beep_enable:
Sound alarm enabled
------------------------------------
[tim@helen ~]$ sudo sensors
w83697hf-isa-0290
Adapter: ISA adapter
VCore: +1.41 V (min = +1.71 V, max = +1.89 V) ALARM
+3.3V: +3.34 V (min = +3.14 V, max = +3.47 V)
+5V: +4.97 V (min = +4.76 V, max = +5.24 V)
+12V: +11.19 V (min = +10.82 V, max = +13.19 V)
-12V: +0.55 V (min = -13.18 V, max = -10.80 V) ALARM
-5V: +0.18 V (min = -5.25 V, max = -4.75 V) ALARM
V5SB: +5.54 V (min = +4.76 V, max = +5.24 V) ALARM
VBat: +2.24 V (min = +2.40 V, max = +3.60 V) ALARM
fan1: 0 RPM (min = 2280 RPM, div = 8) ALARM
fan2: 0 RPM (min = 14062 RPM, div = 2) ALARM
temp1: +31°C (high = +71°C, hyst = -60°C) sensor = thermistor
temp2: +33.0°C (high = +80°C, hyst = +75°C) sensor = thermistor
alarms: Chassis intrusion detection ALARM
beep_enable:
Sound alarm enabled
------------------------------------
I realise the ALARMs mean the reading is out of the specified range,
but who sets these ranges?
Some of them seem absurd eg high=-82C for temp1.
Incidentally, I gather that "hyst" stands for hysterisis,
but what on earth does that mean in this context?
And (finally) how does one tell what the different "temp" refer to?
--
Timothy Murphy
e-mail (<80k only): tim /at/ birdsnest.maths.tcd.ie
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland
