Start/stop fans on Asus Zenbook UX32A

fan.sh

#!/bin/bash

# fan.sh - Script to stop and restart (setting to auto) fans on Asus Zenbook UX32A
# (should work also on other UX-series models - see http://goo.gl/BKcWm1)
# Requires acpi_call kernel module - see https://github.com/mkottman/acpi_call/)
# USAGE: fan.sh auto|stop|full
# Copyright (C) 2014-2023 Juma7C9
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

acpi_call=/proc/acpi/call

base_string='\_SB.PCI0.LPCB.EC0.SFNV'

start_string="${base_string} 0 0"
stop_1_string="${base_string} 1 0x00"
stop_2_string="${base_string} 2 0x00"

full_1_string="${base_string} 1 0xFF"
full_2_string="${base_string} 2 0xFF"

debug="False"

info() {
        if [ "${debug}" == "True" ]; then
                echo "[INFO] $1"
        fi
}


if [ ! -f $acpi_call ]
then
        if [[ $UID = 0 ]]
        then
                info 'Running `modprobe acpi_call`'
                modprobe acpi_call
        else
        echo "[ERROR] '$acpi_call' not found. Try \`modprobe acpi_call\`."
        exit 1
        fi
fi

if [ ! -f $acpi_call ]
then
        echo "[ERROR] '$acpi_call still' not found. Try running \`dkms autoinstall -k KERNEL_VERSION\`."
        exit 1
fi

call() {
        string=$1

        if [[ $UID = 0 ]]
        then
                echo $string > $acpi_call
                rtn=`cat $acpi_call | tr -d '\0'`
        else
                echo $string | sudo tee $acpi_call >/dev/null
                rtn=`sudo cat $acpi_call | tr -d '\0'`
        fi

        info "String '$string' called."

        if [ `echo "$rtn" | cut -b-3` != '0x0' ]
        then
                info "Something has likely gone wrong."
        fi

        info "Return value is '$rtn'"
}

case $1 in
        auto)
                call "$start_string"
                ;;
        stop)
                call "$stop_1_string"
                call "$stop_2_string"
                ;;
        full)
                call "$full_1_string"
                call "$full_2_string"
                ;;
        [0-9A-F]*)
                call "${base_string} 1 0x$1"
                call "${base_string} 2 0x$1"
                ;;
        *)
                echo "[ERROR] Usage: $0 auto|stop|full"
esac

exit 0

fancontrol-sh.service

[Unit]
Description=fancontrol.sh service

[Service]
ExecStart=/usr/bin/fancontrol.sh
Restart=always
RestartSec=30

[Install]
WantedBy=multi-user.target

fancontrol.sh

#!/bin/bash

INTERVAL="10s"
INPUT_DRIVER="coretemp"
FAN_CMD="/usr/bin/fan.sh"

# Find correct input temperature path
for hwmon in `ls /sys/class/hwmon/`; do
        driver=$(</sys/class/hwmon/$hwmon/name)
        if [ "$driver" == "$INPUT_DRIVER" ]; then
                break
        fi
done
TEMP_PATH="/sys/class/hwmon/$hwmon/temp1_input"


CURVE=lin_curve

lin_curve() {
        m=11
        q=-640
        echo "obase=16; r = $m * $1 + $q; if ( r<48 ) 0 else r" | bc
}

while true; do
        temp="$(( $(cat $TEMP_PATH) / 1000 ))"
        ${FAN_CMD} "$($CURVE $temp)"
        sleep "${INTERVAL}"
done