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MightyPork

Member

From: Prague, Czech Republic

Registered: 2014-06-16

Posts: 93

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fancontrol shuts down early -> full fan speed during shutdown

I'm wondering if there's a way to do something about this:

I'm using the fancontrol service, configured by the Wiki, and it kind of works.

However, there's a safety feature (I think) that sets fan speed to 100% on exit, instead of giving control back to BIOS or whatever controls it normally.

During shutdown after the service is terminated (which is almost immediately), you get airplane-takeoff-level of noise, as the fan is howling at max speed.

Any way to configure that?

I also have a weird glitch that it sometimes sets fan speed to very high for like 200 ms, not really sure what is happening.
I'm thinking maybe crash & restart by systemd, but there's nothing in the log (or I'm reading it wrong).

Here's some logs, probably useless:

$ cat /etc/fancontrol 
# Configuration file generated by pwmconfig, changes will be lost
INTERVAL=10
DEVPATH=hwmon2=devices/platform/nct6775.656
DEVNAME=hwmon2=nct6776
FCTEMPS= hwmon2/pwm2=hwmon2/temp2_input
FCFANS= hwmon2/pwm2=hwmon2/fan2_input
MINTEMP= hwmon2/pwm2=50
MAXTEMP= hwmon2/pwm2=80
MINSTART= hwmon2/pwm2=150
MINSTOP= hwmon2/pwm2=0
MAXPWM=hwmon2/pwm2=255

$ systemctl status fancontrol
● fancontrol.service - Start fan control, if configured
   Loaded: loaded (/usr/lib/systemd/system/fancontrol.service; enabled; vendor preset: disabled)
   Active: active (running) since Út 2015-08-18 22:45:52 CEST; 13min ago
 Main PID: 290 (fancontrol)
   CGroup: /system.slice/fancontrol.service
           ├─ 290 /bin/bash /usr/sbin/fancontrol
           └─2197 sleep 1

srp 18 22:45:53 Silencio fancontrol[290]: Depends on hwmon2/temp2_input
srp 18 22:45:53 Silencio fancontrol[290]: Controls hwmon2/fan2_input
srp 18 22:45:53 Silencio fancontrol[290]: MINTEMP=50
srp 18 22:45:53 Silencio fancontrol[290]: MAXTEMP=80
srp 18 22:45:53 Silencio fancontrol[290]: MINSTART=150
srp 18 22:45:53 Silencio fancontrol[290]: MINSTOP=0
srp 18 22:45:53 Silencio fancontrol[290]: MINPWM=0
srp 18 22:45:53 Silencio fancontrol[290]: MAXPWM=255
srp 18 22:45:53 Silencio fancontrol[290]: Enabling PWM on fans...
srp 18 22:45:53 Silencio fancontrol[290]: Starting automatic fan control...

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