At the end of last week I brought my Laptop to my hardware dealer,
because it smelt burnt suddenly at the beginning of last week---but
without observing any impairment of functionality. My hardware
dealer couldn't find anything, but mentioned, that my fan activates
too late. He observed activation not until 69C; sometimes it starts
up at 63C or 65C with me, but I wouldn't contradict completely,
because his statement corresponds to the following output:

chris@skull:~$cat /proc/acpi/thermal_zone/THRM/trip_points
critical (S5): 101 C
passive: 95 C: tc1=4 tc2=3 tsp=300 devices=0xcdfee760
active[0]: 70 C: devices=0xcdf213e0

So I tried to manipulate the trip_points following

root@skull:~#echo -n "101:0:90:60:0" > trip_points

chris@skull:~$cat /proc/acpi/thermal_zone/THRM/trip_points
critical (S5): 101 C
passive: 90 C: tc1=4 tc2=3 tsp=300 devices=0xcdfee760
active[0]: 60 C: devices=0xcdf213e0

But nothing changes. Currently the CPU temperature is 65C, but the
fan is standing still. Then I checked, whether I got a buggy DSDT
following http://forums.gentoo.org/viewtopic.php?t=122145 :

root@skull:/tmp/DSDT#iasl -tc dsdt.dsl

Intel ACPI Component Architecture
ASL Optimizing Compiler / AML Disassembler version 20040715 [Aug 25
Copyright (C) 2000 - 2004 Intel Corporation
Supports ACPI Specification Revision 2.0c

ASL Input: dsdt.dsl - 6419 lines, 189822 bytes, 1370 keywords
AML Output: DSDT.aml - 19846 bytes 452 named objects 918 executable

Compilation complete. 0 Errors, 0 Warnings, 0 Remarks, 428 Optimizations

Everything seems to be allright.

System information:
- Laptop: IPC Power Note M 8375

- CPU:
chris@skull:~$fgrep "model name" /proc/cpuinfo
model name : mobile AMD Athlon(tm) XP 2200+

- Kernel:
chris@skull:~$uname -rs

- Distribution: Debian Woody/Sarge

The output of
dmesg -s40000
lspci -vv
cat /proc/interrupts
can I put on my home-webserver, if required.

My questions:
- are the default trip_points really too high?

- where are the trip_points defined (DSDT?)?

- how can I manipulate the trip_points lasting and effective?

- is there a comprehensive description of ACPI in kernel 2.6 and
information how to the user can use resp. manage these features?

Thanks for reading this long posting!

Best regards,

PS: I sent a similar posting to linux.debian.laptop yesterday, but
it took hours until it appeared there and I still got no answer as
many others, that already posted days ago. So, please don't blame me
for that kind of not stamped cross-posting.