How to configure cpufreqd

NOTE!

Make sure you have the appropriate kernel modules loaded, such as cpufreq_powersave, cpufreq_userspace, and cpufreq_ondemand (see above note).

In Debian, all you have to do is:

# apt-get install cpufreqd

And in most cases it will work out of the box.

This is the default Debian config, but works well out of the box. Notice that the syntax for the config file has changed in cpufreqd-2.0.0, where you need to close [] sections with tags like [/Profile] or [/Rule].

# this is a comment
#
# you need: 1 [General] section,
#           1 or more [Profile] sections
#                1 or more [Rule] sections
#
# a section ends at the first blank line
#
# [Rule] sample:
#           [Rule]
#           name=sample_rule
#           ac=on                    # (on/off)
#           battery_interval=0-10
#           cpu_interval=30-60
#           programs=xine,mplayer
#           profile=sample_profile
#
# [Profile] sample:
#           [Profile]
#           name=sample_profile
#           minfreq=10%
#           maxfreq=100%
#           policy=performance
#
# see CPUFREQD.CONF(5) manpage for a complete reference

[General]
pidfile=/var/run/cpufreqd.pid
poll_interval=2
pm_type=acpi #(acpi, apm or pmu)
# Uncomment the following line to enable ACPI workaround (see cpufreqd.conf(5)) # acpi_workaround=1
verbosity=4 #(if you want a minimal logging set to 5)

[Profile]
name=hi_boost
minfreq=66%
maxfreq=100%
policy=performance

[Profile]
name=medium_boost
minfreq=33%
maxfreq=66%
policy=performance

[Profile]
name=lo_boost
minfreq=0%
maxfreq=33%
policy=performance

[Profile]
name=lo_power
minfreq=0%
maxfreq=33%
policy=powersave

# conservative mode when not AC
[Rule]
name=conservative
ac=off                   # (on/off)
battery_interval=0-100
cpu_interval=0-40
cpu_nice_scale=1.5
delay_cycles=3
profile=lo_boost

# need some power
[Rule]
name=lo_cpu_boost
ac=off                   # (on/off)
battery_interval=0-100
cpu_interval=30-80
profile=medium_boost

# need big power (not if battery very low)
[Rule]
name=hi_cpu_boost
ac=off                   # (on/off)
battery_interval=50-100
cpu_interval=70-100
profile=medium_boost

# full power when AC
[Rule]
name=AC_on
ac=on                   # (on/off)
profile=hi_boost

# full power when watching DVDs and not AC:
# this is the last rule and takes less
# precedence with respect to the others
[Rule]
name=dvd_watching
ac=off                   # (on/off)
battery_interval=0-100
programs=xine,totem,vlc,avidemux
cpu_interval=0-100
profile=hi_boost