Laptop automatic shutdown when Arch startup

Question

My laptop automatic shutdown while in arch linux startup but i already enable phc_cpufreq undervolt and its voltage and also i added cpufreq_ondemand modules
but when the time the system boot black background with text  the startup suddenly said temperature max reach 70C and it post shutdown after a 5 second the laptop shutdown...eventhough my pentium -m can reach 100C
when after waiting about 10 minutes and i turn on the laptop back it go smoothly startup and i can log in to DE.It never shutdown after that even i was using the laptop 100% load but if i restart the pc it will go to startup and post the msg reach temperature max and auto shutdown
anyone here can help me to disable archlinux kernel or whatever startup process that automatically shutdown the laptop
phc vids show my correct vids so i got a feeling it only activate if  the system manage go to DE kde and loggin but not when on boot Startup archlinux

Answer 1

I had this problem on my ThinkPad r51p which would suddenly say critical temperature reached and shut down. It was the same with different linux distros and FreeBSD as well.
I found no other solution to the problem but writing a small script that I always had running in the background:
#!/usr/local/bin/php
<?php
$slow = FALSE;
while(1) {
$temperatur = `cat /proc/acpi/thermal_zone/THM0/temperature | grep temperature | awk ' { print $2 } ' `;
if((int)$temperatur > 85 && !$slow) {
// print "Slowing down".$temperatur." C";
system("echo -n 600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq"); $slow = TRUE;
} elseif((int)$temperatur < 80 && $slow) {
// print "Speeding up".$temperatur." C";
system("echo -n 1700000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq"); $slow = FALSE;
sleep(3);
?>
But most likely there is a more elegant solution to it than this.
And, btw, Do NOT try this script unless you know exactly what your doing and the settings are right for your CPU
Last edited by dr_relling (2009-02-24 23:48:09)