Thermal issues when on battery

[takawata at jp.frebsd.org]

In message <20050928080217.S5989 at localhost>, Brad Miele $B$5$s$$$o$/(B:
>Hi,
>
>I recently had the mainboard on my HP NC6230 replaced under warrantee for 
>a no-post issue. Since it has been returned, the machine throws an error 
>of temperature too high and shuts down moments after it is unplugged and 
>under battery power. It runs continuously with no problems when 
>plugged in. I have never had to adjust the acpi stuff before, and 
>have gone so far as to dump the asl for my system, I assume that I have to 
>change something in there and override it at boot? The HP tech report on 
>the new mainboard states that the bios is current, I may double check that 
>today.
>
>Any advice would be appreciated. I have attached dmesg, and systctl 
>hw.acpi below.
>
>this is the syslog from when i remove the ac adapter:
>
>Sep 27 07:19:51 payswan kernel: cpu0: Cx states changed
>Sep 27 07:19:51 payswan power_profile: changed to 'economy'
>Sep 27 07:20:11 payswan root: WARNING: system temperature too high, 
>shutting down soon!
>Sep 27 07:20:21 payswan kernel: acpi_tz2: WARNING - current temperature 
>(149.4C) exceeds safe limits
>Sep 27 07:20:22 payswan syslogd: exiting on signal 15
>
>thanks,
>
>Brad

Would you show us acpidump -t -d result, too?
TZ2 seems to have gone invalid state. There may be some notify to 
tell  the thermal zone detached or so.