The file is /etc/init.d/ondemand
.
Without any additional packages, you can manipulate the frequency scaling governors using primitive commands.
First, determine what available governors you have available:
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_available_governors
Perhaps see what you currently have:
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
And then, if different than what you want, just set one of the other available governors, in this example performance:
$ sudo su
# for file in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do echo "performance" > $file; done
# exit
Example:
$ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_available_governors
performance powersave
performance powersave
performance powersave
performance powersave
performance powersave
performance powersave
performance powersave
performance powersave
$ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
powersave
powersave
powersave
powersave
powersave
powersave
powersave
powersave
$ sudo su
# for file in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do echo "performance" > $file; done
# exit
exit
$ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
performance
performance
performance
performance
performance
performance
performance
performance