Overheating Laptop

[David Fox]

On Mon, Jun 16, 2008 at 8:23 AM, Derek Broughton <news at pointerstop.ca> wrote:
> The sensors command was telling me my laptop was at 71C:
> $ sensors
> coretemp-isa-0000
> Adapter: ISA adapter
> Core 0:      +71.0°C  (crit = +100.0°C)

Hmm. Well, I'd like to chime in, but I am not on a laptop. I'm on a
non-overheating :) desktop, amd64, ECS 6100-pm-m2 motherboard, and I
get different output for sensors which don't correspond to what is in
the /proc/acpi files. So, I wonder how accurate these readings are.

In particular, fan reports vary wildly for one of my fans, I have a
large fan on the CPU (of course) but two or three case fans and the
power supply (Enermax) fan. Usually all 3 case fans would be running,
but only 2 are now, because there just isn't a header available on the
motherboard for the second fan, but there is for the first, and it's
hooked up. (The other fan is running as well, but it's in series with
the power supply fan as far as I can tell.

fox at newbox:~$ sensors
k8temp-pci-00c3
Adapter: PCI adapter
Core0 Temp:  +41.0°C
Core0 Temp:  +36.0°C
Core1 Temp:  +41.0°C
Core1 Temp:  +38.0°C

it8716-isa-0290
Adapter: ISA adapter
VCore:       +1.34 V  (min =  +0.00 V, max =  +4.08 V)
VDDR:        +2.48 V  (min =  +0.00 V, max =  +4.08 V)
+3.3V:       +1.86 V  (min =  +0.00 V, max =  +4.08 V)
+5V:         +5.54 V  (min =  +0.00 V, max =  +6.85 V)
+12V:        +4.86 V  (min =  +0.00 V, max = +16.32 V)
in5:         +1.17 V  (min =  +0.00 V, max =  +4.08 V)
in6:         +2.80 V  (min =  +0.00 V, max =  +4.08 V)
5VSB:        +5.08 V  (min =  +0.00 V, max =  +6.85 V)
VBat:        +3.04 V
fan1:       2327 RPM  (min =    0 RPM)
fan2:       2319 RPM  (min =    0 RPM)
temp1:       +52.0°C  (low  =  -1.0°C, high = +127.0°C)  sensor = thermal diode
temp2:       +35.0°C  (low  =  -1.0°C, high = +127.0°C)  sensor = transistor
temp3:       +25.0°C  (low  =  -1.0°C, high = +127.0°C)  sensor = transistor
cpu0_vid:   +1.525 V

Note first - the temperature from the first core0 differs from the
"temp1" readings.
Note 2nd: the fan speed #1 doesn't vary that much. Fan2 varies wildly,
from ~25 rpm to the present 2319 rpm, and it'll change the next time I
run sensors - even in a few seconds from now.

Here's what acpi gives for thermal. I haven't found where it stores
the fan speeds if it does at all.


dfox at newbox:~$ acpi -V f
     Thermal 1: ok, 53.0 degrees C

This is a relatively new motherboard.

> derek