cpu speed governor based on temp [solved]

[pagaman]

'lo peeps.

I've an acer aspire 1522.
Nice little laptop with one problem.
Whilst I've got a cpu governor going (powernowd)

It doesn't slow the cpu down when it gets too hot.

The upper thermal limit is 90C,
The fan is controlled by the bios, and speeds up nicely,
however if I'm doing anything cpu intensive, then powernowd puts the cpu on 100%
and the machine overheats.

Presumambly other people have got around this, so my question is how?
is there a way to get powernowd to respond to temperature, and slow the cpu down if it
get too hot?

Thanks in advance
_________________
History only remembers great people by forgetting their mistakes.

[crazycat]

You can certainly write a script which reads temerature each 5 seconds somewhere from /sys/devices/platform/i2c-1/1-0290/bus/devices/ and modifiers userspace daemon accordinly through /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed

[pagaman]

Yeah, I've banged off a quick, little script, thats a bit crappy, but works...
Script is below in case someone comes across this searching for someting similar.

I'll probably end up changing it so that it stops / starts the powernowd daemon,
and make it a service...


#!/usr/bin/python

import os,re,time,string

hi=1800000
med=1600000
low=800000

critical_temp=85
hi_temp=80

def set_speed (speed):
speed_line = "Setting speed to %i" % speed
print speed_line
#os.system("echo %s > /dev/speech" % speed_line)
os.system("echo -n %i > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed" % speed)

def cpu_gov (command):
if (command == "start") :
#os.system("/etc/init.d/powernowd start > /dev/null")
print "Starting powernowd"

elif (command == "stop") :
#os.system("/etc/init.d/powernowd stop > /dev/null ")
print "stopping powernowd"


def get_temp():
CPU_temp_file = "/proc/acpi/thermal_zone/THRC/temperature"
fd = open(CPU_temp_file,"r")
line = fd.readline()
fd.close()
temp = re.search("\d\d",line)
return temp.group()


while 1:
temp = string.atoi(get_temp())
print "Temp is %i" % temp

if temp >= critical_temp:
cpu_gov("stop")
set_speed(low)
time.sleep(180)
elif temp >= hi_temp:
cpu_gov("stop")
set_speed(med)
else:
set_speed(hi)
cpu_gov("start")
time.sleep(5)
_________________
History only remembers great people by forgetting their mistakes.