Fix DELL freezes

fixdell

#!/bin/bash
### BEGIN INIT INFO
# Provides:          fixdell
# Required-Start:    $local_fs $syslog $named
# Required-Stop:     $local_fs $syslog $named
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Fix DELL freezes
# Description:       startup script for Fix DELL freezes
### END INIT INFO


#
# /etc/init.d/fixdell -- startup script
#
# move this file to `/etc/init.d`
# Then do `chmod +x /etc/init.d/fixdell`
# update-rc.d fixdell defaults
# 
# To remove do:
# update-rc.d fixdell remove
# 


if [ "$UID" != "0" ]
then
    echo "You must be root"
    exit;
fi

case "$1" in
    start)
        for file in `ls /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor`; do
            echo performance > $file
        done;
        # echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
        ;;
    check)
        nom=0
        for file in `ls /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor`; do
            echo "[$nom] $file : `cat $file`"
            let "nom = nom + 1"
        done;
        # echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
        ;;
    reset)
        # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
        ;;

    stop)
        ;;
    restart)
        ;;
    *)
        echo "Please use start, stop, check, restart or reset as first argument"
        ;;
esac

I have two DELL laptops. And both are freeze randomly.
This startup script fixes freezes.

I found solving on following pages:
https://blog.hosni.me/2018/07/fix-linux-freezing-problem-on-dell.html
https://ixnfo.com/en/changing-cpu-scaling-governor-on-linux.html