I'm using 8.10 32 bit edition, but my CPU is a 2.0 Dothan, so power
management is done by acpi-cpufreq instead of powernow_k8.

$ lsmod | grep cpufreq
acpi_cpufreq           15500  0 
cpufreq_userspace      11396  0 
cpufreq_stats          13188  0 
cpufreq_powersave       9856  1 
cpufreq_ondemand       14988  0 
freq_table             12672  3 acpi_cpufreq,cpufreq_stats,cpufreq_ondemand
cpufreq_conservative    14600  0 
processor              42156  3 acpi_cpufreq,thermal

My /proc/acpi/thermal_zone/ has a THRM directory, not THRC, and it
contains:

$ cat cooling_mode 
<setting not supported>

$ cat trip_points 
critical (S5):           100 C

$ cat polling_frequency 
<polling disabled>

Adding "options thermal tzp=30 act=0 crt=0 psv=0" to
/etc/modprobe.d/options does not change this value after reboot, it
keeps showing "<polling disabled>", but one time I have managed to
unload module thermal and reload it with these parameters, it showed "3
seconds". Anyway it does not work, and it shuts down when it reaches
critical trip point.

Now I'm trying to repeat test but I can't unload thermal, because it
says it's in use.

Any hint?

My kernel is 2.6.27-20-generic, but thermal module shows the same info:

sp...@vulcan:/proc/acpi/thermal_zone/THRM$ modinfo thermal
filename:       /lib/modules/2.6.27-10-generic/kernel/drivers/acpi/thermal.ko
license:        GPL
description:    ACPI Thermal Zone Driver
author:         Paul Diefenbaugh
srcversion:     1787CE9FEB053C917D031A9
alias:          acpi*:LNXTHERM:*
depends:        processor
vermagic:       2.6.27-10-generic SMP mod_unload modversions 586 
parm:           act:Disable or override all lowest active trip points. (int)
parm:           crt:Disable or lower all critical trip points. (int)
parm:           tzp:Thermal zone polling frequency, in 1/10 seconds. (int)
parm:           nocrt:Set to take no action upon ACPI thermal zone critical 
trips points. (int)
parm:           off:Set to disable ACPI thermal support. (int)
parm:           psv:Disable or override all passive trip points. (int)


Cheers.

-- 
CPU overheats during high usage "throttling <not supported>"
https://bugs.launchpad.net/bugs/22336
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