README.md

Thinkfan Configuration for Lenovo X-Series

Why?

X-Series seems to have an issue with the fan control on suspend. In particular when thinkfan is active during suspending, the fan will continue to run indefinitely, even in suspended state.

How?

The systemd configuration used here simply stops thinkfan right before going to sleep, and reactivates it upon wakeup.

The solution adapts a comment made on thinkfan's github page, vmatare/thinkfan#181 (comment)

Installation

1. Install thinkfan as per usual instructions

2. Copy the ./etc/systemd files in this repository to their corresponding directories in /etc/ on your system

3. Restart thinkfan

thinkfan-sleep-hack.service

# https://github.com/vmatare/thinkfan/issues/181#issuecomment-1353799531
[Unit]
Description=Set fan to auto so BIOS can shut off fan during S2 sleep
Before=sleep.target
After=thinkfan-sleep.service

[Service]
Type=oneshot
ExecStart=/usr/bin/logger -t '%N' "Setting /proc/acpi/ibm/fan to 'level auto'"
ExecStart=/usr/bin/bash -c '/usr/bin/echo "level auto" > /proc/acpi/ibm/fan'

[Install]
WantedBy=sleep.target

thinkfan-sleep.service

[Unit]
Description=Notify thinkfan of imminent sleep
Before=sleep.target

[Service]
Type=oneshot
ExecStart=/usr/bin/pkill -x -pwr thinkfan 
# Hack: Since the signal handler races with the sleep, we need to delay a bit
ExecStart=/usr/bin/sleep 1

[Install]
WantedBy=sleep.target

thinkfan-wakeup.service

[Unit]
Description=Reload thinkfan after waking up from suspend
After=sysinit.target
After=suspend.target
After=suspend-then-hibernate.target
After=hybrid-sleep.target
After=hibernate.target

[Service]
Type=oneshot
# original: ExecStart=/usr/bin/pkill -x -usr2 thinkfan
ExecStart=/usr/bin/pkill -x -usr2 thinkfan
# thinkfan can exit with 1 if thinkfan is not running, and 0 if it was running. both is ok
SuccessExitStatus=0 1
# be sure to reload
ExecStartPost=/usr/bin/systemctl restart thinkfan.service

[Install]
WantedBy=sleep.target

thinkfan.conf

options thinkpad_acpi fan_control=1

thinkfan.service

[Unit]
Description=Thinkfan, the minimalist fan control program
Documentation=man:thinkfan
After=sysinit.target
After=systemd-modules-load.service

[Service]
Type=forking
EnvironmentFile=-/etc/default/thinkfan
ExecStart=/usr/sbin/thinkfan $THINKFAN_ARGS $DAEMON_ARGS
PIDFile=/run/thinkfan.pid
ExecReload=/bin/kill -HUP $MAINPID

[Install]
WantedBy=multi-user.target
Also=thinkfan-sleep.service
Also=thinkfan-wakeup.service