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TomaszGasior/dell-custom-fan-speed

Last active October 22, 2024 09:20
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Custom fan speed for Dell Optiplex 7050 Micro on Fedora 37 with Intel Core i7-7700T
Raw
dell-custom-fan-speed
#!/bin/bash
export CPU_TEMP_THRESHOLD_FOR_FAN_SPEED_LOW=54
export CPU_TEMP_THRESHOLD_FOR_FAN_SPEED_HIGH=68
export SLEEP_TIME_SECS=10
export GET_CPU_TEMP_FILE=/sys/devices/platform/coretemp.0/hwmon/hwmon*/temp1_input
export SET_FAN_SPEED_FILE=/sys/devices/platform/dell_smm_hwmon/hwmon/hwmon*/pwm1
export FAN_SPEED_OFF=0
export FAN_SPEED_LOW=120
export FAN_SPEED_HIGH=250
while true; do
current_cpu_temp=$((`cat $GET_CPU_TEMP_FILE` / 1000))
if (( $current_cpu_temp >= $CPU_TEMP_THRESHOLD_FOR_FAN_SPEED_LOW )); then
echo $FAN_SPEED_LOW > $SET_FAN_SPEED_FILE
if (( $current_cpu_temp >= $CPU_TEMP_THRESHOLD_FOR_FAN_SPEED_HIGH )); then
sleep 1
echo $FAN_SPEED_HIGH > $SET_FAN_SPEED_FILE
fi
else
echo $FAN_SPEED_OFF > $SET_FAN_SPEED_FILE
fi
sleep $SLEEP_TIME_SECS
done
Raw
dell-custom-fan-speed.service
[Unit]
Description=Custom fan speed of Dell computer using i8k driver
[Service]
Type=simple
ExecStart=/usr/local/libexec/dell-custom-fan-speed
Restart=always
[Install]
WantedBy=multi-user.target
Raw
dell_smm_hwmon-force.conf
options dell_smm_hwmon force=1
@TomaszGasior
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TomaszGasior commented Apr 2, 2023 •
edited
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Install files to:

  • dell-custom-fan-speed → /usr/local/libexec
  • dell-custom-fan-speed.service → /usr/local/lib/systemd/system
  • dell_smm_hwmon.conf → /etc/modules-load.d
  • dell_smm_hwmon-force.conf → /etc/modprobe.d

Enable with:

  • sudo systemctl daemon-reload; sudo systemctl enable dell-custom-fan-speed.service
  • sudo dracut --force (rebuild initramfs)
  • reboot

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