Set a static fan speed for an AMD GPU in Linux

initialize-Radeon-fan-tuning.service

# Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted.

# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

[Unit]
Description=Configure custom tuned fan behavior for the Radeon RX 580 during OS initialization.
Documentation="https://www.kernel.org/doc/html/v5.11/gpu/amdgpu.html#gpu-power-thermal-controls-and-monitoring"

[Service]
Type=oneshot
ExecStart=/usr/local/sbin/tune-RX580-fans.sh

[Install]
WantedBy=multi-user.target# Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted.

# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

[Unit]
Description=Configure custom tuned fan behavior for the Radeon RX 580 during OS initialization.
Documentation="https://www.kernel.org/doc/html/v5.11/gpu/amdgpu.html#gpu-power-thermal-controls-and-monitoring"

[Service]
Type=oneshot
ExecStart=/usr/local/sbin/tune-RX580-fans.sh

[Install]
WantedBy=multi-user.target

tune-RX580-fans.sh

#!/usr/bin/env bash 
# Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted.

# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

NO_FAN_CTL=0
MANUAL_FAN_CTL=1
AUTO_FAN_CTL=2

AMDGPU_FAN_RPM='fan1'

AMDGPU_DEVICE='/sys/class/drm/card0/device'
HWMON_ID='hwmon/hwmon1'

# Pulse Width Modulation (PWM) Duty-Cycle (DC) HWMON controls
AMDGPU_FAN_DUTY_CYCLE='pwm1'
AMDGPU_FAN_CTL="${AMDGPU_FAN_DUTY_CYCLE}_enable"

# Revolutions Per Minute (RPM) HWMON controls
AMDGPU_FAN_TGT="${AMDGPU_FAN_RPM}_target"

# Fan operating parameters
read FAN_PWM_MIN < "${AMDGPU_DEVICE}/${HWMON_ID}/${AMDGPU_FAN_DUTY_CYCLE}_min"
read FAN_PWM_MAX < "${AMDGPU_DEVICE}/${HWMON_ID}/${AMDGPU_FAN_DUTY_CYCLE}_max"
read FAM_RPM_MIN < "${AMDGPU_DEVICE}/${HWMON_ID}/${AMDGPU_FAN_RPM}_min"
read FAM_RPM_MAX < "${AMDGPU_DEVICE}/${HWMON_ID}/${AMDGPU_FAN_RPM}_max"

# Dell Radeon RX 580 (OEM)
# See also: https://www.techpowerup.com/gpu-specs/radeon-rx-580-oem.c3112
#TARGET_MIN_DC=155   # 2,200 RPM
#TARGET_MIN_DC=160   # 2,300 RPM
#TARGET_MIN_DC=163   # 2,400 RPM
TARGET_MIN_DC=165   # 2,450 RPM
#TARGET_MIN_DC=167   # 2,500 RPM

#TARGET_MIN_RPM=2157

echo "${MANUAL_FAN_CTL}"  | tee "${AMDGPU_DEVICE}/${HWMON_ID}/${AMDGPU_FAN_CTL}"
echo "${TARGET_MIN_DC}" | tee "${AMDGPU_DEVICE}/${HWMON_ID}/${AMDGPU_FAN_DUTY_CYCLE}"
#echo "${TARGET_MIN_RPM}" | tee "${AMDGPU_DEVICE}/${HWMON_ID}/${AMDGPU_FAN_TGT}"