fancontrol-gui generates invalid /etc/fancontrol configuration file.

[zelifcam]

Fancontrol-gui APP actually just populates a text file /etc/fancontrol. I've noticed that the fancontrol-gui app has been generating an invalid fancontrol file.

FIRST BE SURE TO FIRST USE THE FANCONTROL-GUI APP to GENERATE A CONFIG.
If done properly you will see something similar to the one I have below.

Check if fancontrol.service is actually enabled and running?
As you can see, it's enabled, but failing to start because of a failed device path.
$ sudo systemctl status fancontrol.service

× fancontrol.service - Start fan control, if configured
     Loaded: loaded (/usr/lib/systemd/system/fancontrol.service; enabled; preset: disabled)
     Active: failed (Result: exit-code) since Mon 2023-01-16 10:22:12 MST; 3s ago
   Duration: 118ms
    Process: 114665 ExecStart=/usr/sbin/fancontrol (code=exited, status=1/FAILURE)
   Main PID: 114665 (code=exited, status=1/FAILURE)
        CPU: 203ms

Jan 16 10:22:12 arch-workstation fancontrol[114665]:   MAXTEMP=47
Jan 16 10:22:12 arch-workstation fancontrol[114665]:   MINSTART=255
Jan 16 10:22:12 arch-workstation fancontrol[114665]:   MINSTOP=0
Jan 16 10:22:12 arch-workstation fancontrol[114665]:   MINPWM=0
Jan 16 10:22:12 arch-workstation fancontrol[114665]:   MAXPWM=255
Jan 16 10:22:12 arch-workstation fancontrol[114665]:   AVERAGE=1
Jan 16 10:22:12 arch-workstation fancontrol[114665]: Device path of hwmon12 has changed
Jan 16 10:22:12 arch-workstation fancontrol[114665]: Configuration appears to be outdated, please run pwmconfig again
Jan 16 10:22:12 arch-workstation systemd[1]: fancontrol.service: Main process exited, code=exited, status=1/FAILURE
Jan 16 10:22:12 arch-workstation systemd[1]: fancontrol.service: Failed with result 'exit-code'.

Take a look at /etc/fancontrol and see if it is missing the line break:

Here's the config file fixed:

cat /etc/fancontrol                           
# This file was created by Fancontrol-GUI
INTERVAL=10
DEVPATH=hwmon4=devices/pci0000:00/0000:00:18.3
hwmon12=devices/platform/nct6775.656/hwmon/hwmon12
DEVNAME=hwmon4=zenpower hwmon12=nct6798 
FCTEMPS=hwmon12/pwm1=hwmon4/temp1_input hwmon12/pwm2=hwmon4/temp1_input hwmon12/pwm3=hwmon4/temp1_input hwmon12/pwm6=hwmon4/temp1_input 
FCFANS=hwmon12/pwm1=hwmon12/fan1_input hwmon12/pwm2=hwmon12/fan2_input hwmon12/pwm3=hwmon12/fan3_input hwmon12/pwm6=hwmon12/fan6_input 
MINTEMP=hwmon12/pwm1=30 hwmon12/pwm2=30 hwmon12/pwm3=49 hwmon12/pwm6=30 
MAXTEMP=hwmon12/pwm1=49 hwmon12/pwm2=49 hwmon12/pwm3=60 hwmon12/pwm6=47 
MINSTART=hwmon12/pwm1=255 hwmon12/pwm2=255 hwmon12/pwm3=255 hwmon12/pwm6=255 
MINSTOP=hwmon12/pwm1=0 hwmon12/pwm2=0 hwmon12/pwm3=0 hwmon12/pwm6=0 
MINPWM=hwmon12/pwm1=0 hwmon12/pwm2=0 hwmon12/pwm3=0 hwmon12/pwm6=0 
MAXPWM=hwmon12/pwm1=255 hwmon12/pwm2=255 hwmon12/pwm3=255 hwmon12/pwm6=255 
AVERAGE=hwmon12/pwm1=1 hwmon12/pwm2=1 hwmon12/pwm3=1 hwmon12/pwm6=1 

Restart the service:
$ sudo systemctl restart fancontrol.service

Here it is working:
$ sudo systemctl status fancontrol.service

┌─[admin@arch-workstation] - [~] - [2023-01-16 10:28:43]
└─[0] <> sudo systemctl status fancontrol.service
● fancontrol.service - Start fan control, if configured
     Loaded: loaded (/usr/lib/systemd/system/fancontrol.service; enabled; preset: disabled)
     Active: active (running) since Mon 2023-01-16 10:25:54 MST; 2min 57s ago
   Main PID: 145121 (fancontrol)
      Tasks: 2 (limit: 77033)
     Memory: 1.5M
        CPU: 414ms
     CGroup: /system.slice/fancontrol.service
             ├─145121 /bin/bash /usr/sbin/fancontrol
             └─166454 sleep 10

Jan 16 10:25:54 arch-workstation fancontrol[145121]:   Controls hwmon12/fan6_input
Jan 16 10:25:54 arch-workstation fancontrol[145121]:   MINTEMP=30
Jan 16 10:25:54 arch-workstation fancontrol[145121]:   MAXTEMP=47
Jan 16 10:25:54 arch-workstation fancontrol[145121]:   MINSTART=255
Jan 16 10:25:54 arch-workstation fancontrol[145121]:   MINSTOP=0
Jan 16 10:25:54 arch-workstation fancontrol[145121]:   MINPWM=0
Jan 16 10:25:54 arch-workstation fancontrol[145121]:   MAXPWM=255
Jan 16 10:25:54 arch-workstation fancontrol[145121]:   AVERAGE=1
Jan 16 10:25:54 arch-workstation fancontrol[145121]: Enabling PWM on fans...
Jan 16 10:25:54 arch-workstation fancontrol[145121]: Starting automatic fan control...

This fix allows my fan curves to work, but breaks the ability to use the fancontrol-gui app as it will complain the config file is wrong.