disable frequency scaling after jack startup

[hdr]

Before starting jack I manually do:

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cpupower frequency-set -g performance

to disable frequency scaling and after shutdown:

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cpupower frequency-set -g powersave

to enable it again.

I would like to automate these commands when starting and shutting down jack.

As described here viewtopic.php?f=27&t=20776
my jack post startup script looks like:

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pactl set-card-profile alsa_card.pci-0000_00_1b.0 off && pactl set-card-profile alsa_card.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00 off && pactl load-module module-jack-sink

and my post shutdown script like:

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pactl set-card-profile alsa_card.pci-0000_00_1b.0 output:analog-stereo

If I add the cpupower commands it doesn't work because root permissions are required.

[bluebell]

You can fix that with sudo. But you have to edit /etc/sudoers with "sudo visudo" to add a line like

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%sudo	ALL=(ALL:ALL) NOPASSWD:/usr/bin/cpupower

or wherever cpupower is located.

[hdr]

Thank you. Unfortunately something went wrong.
my startup and shutdown scripts in jack are:

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pactl set-card-profile alsa_card.pci-0000_00_1b.0 off && pactl set-card-profile alsa_card.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00 off && pactl load-module module-jack-sink && sudo cpupower frequency-set -g performance

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pactl set-card-profile alsa_card.pci-0000_00_1b.0 output:analog-stereo && sudo cpupower frequency-set -g powersave

I've editet /etc/sudoers with visudo:

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#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults	env_reset
Defaults	mail_badpass
Defaults	secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

# Host alias specification

# User alias specification

# Cmnd alias specification

# User privilege specification
root	ALL=(ALL:ALL) ALL

# Allow members of group sudo to execute any command
%sudo	ALL=(ALL:ALL) ALL
%sudo	ALL=(ALL:ALL) NOPASSWD:/usr/bin/cpupower

# See sudoers(5) for more information on "#include" directives:

#includedir /etc/sudoers.d

But after starting jack the command

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cpupower frequency-info

shows that the state is still powersafe

[bluebell]

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#!/bin/bash

GOVERNOR=performance
#for CPUFREQ in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
for CPUFREQ in /sys/devices/system/cpu/cpufreq/policy*/scaling_governor
do
  [ -f $CPUFREQ ] || continue
  echo -n $GOVERNOR > $CPUFREQ
done

[hdr]

Sorry, can you help me? What is that supposed to mean?