[Pkg-acpi-devel] Bug#500809: laptop overheating
ms419 at freezone.co.uk
Wed Oct 1 16:28:04 UTC 2008
My Lenovo 3000 N100 recently started regularly overheating. It does not
actually power off, but it slows to a crawl and feels hot to touch. There is
even a faint smell of "hot components".
First, I tried checking the temperature:
ket% cat /proc/acpi/thermal_zone/TZ00/temperature
temperature: 88 C
I also checked the processor "throttling":
ket% cat /proc/acpi/processor/CPU0/throttling
state count: 8
active state: T7
state available: T0 to T7
I guess this explains why the laptop slows to a crawl.
Next I checked the thermal zone "state":
ket% cat /proc/acpi/thermal_zone/TZ00/state
Now, it seems to me that when the laptop is this hot, it should be in "active"
cooling mode. I see this output from "cooling_mode":
ket% cat /proc/acpi/thermal_zone/TZ00/cooling_mode
0 - Active; 1 - Passive
So I tried:
ket:~# echo 0 > /proc/acpi/thermal_zone/TZ00/cooling_mode
However the state remains "passive" and no fans come on, etc.
Finally, this is the output from "trip_points":
ket% cat /proc/acpi/thermal_zone/TZ00/trip_points
critical (S5): 102 C
passive: 87 C: tc1=0 tc2=4 tsp=4 devices=CPU0 CPU1
How can I keep my laptop from overheating?
-- System Information:
Debian Release: lenny/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.26-1-686 (SMP w/2 CPU cores)
Locale: LANG=en_CA.UTF-8, LC_CTYPE=en_CA.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages acpi depends on:
ii libc6 2.7-13 GNU C Library: Shared libraries
acpi recommends no packages.
acpi suggests no packages.
-- no debconf information
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