基于fancontrol和pwmconfig实现PVE中风扇PWM调速 • 薇尔薇

安装#

apt install pwmconfig fancontrol

bash

pwmconfig#

直接启动pwmconfig

root@pve:~# pwmconfig 
# pwmconfig version 3.6.0
This program will search your sensors for pulse width modulation (pwm)
controls, and test each one to see if it controls a fan on
your motherboard. Note that many motherboards do not have pwm
circuitry installed, even if your sensor chip supports pwm.

We will attempt to briefly stop each fan using the pwm controls.
The program will attempt to restore each fan to full speed
after testing. However, it is ** very important ** that you
physically verify that the fans have been to full speed
after the program has completed.

Found the following devices:
   hwmon0 is acpitz
   hwmon1 is nvme
   hwmon2 is coretemp
   hwmon3 is nct6798

Found the following PWM controls:
   hwmon3/pwm1           current value: 255
   hwmon3/pwm2           current value: 255
   hwmon3/pwm3           current value: 255
   hwmon3/pwm4           current value: 153
   hwmon3/pwm5           current value: 153
   hwmon3/pwm6           current value: 255
   hwmon3/pwm7           current value: 255

Giving the fans some time to reach full speed...
Found the following fan sensors:
   hwmon3/fan1_input     current speed: 0 ... skipping!
   hwmon3/fan2_input     current speed: 2732 RPM
   hwmon3/fan3_input     current speed: 0 ... skipping!
   hwmon3/fan4_input     current speed: 0 ... skipping!
   hwmon3/fan5_input     current speed: 0 ... skipping!
   hwmon3/fan6_input     current speed: 2119 RPM
   hwmon3/fan7_input     current speed: 2596 RPM

Warning!!! This program will stop your fans, one at a time,
for approximately 5 seconds each!!!
This may cause your processor temperature to rise!!!
If you do not want to do this hit control-C now!!!
Hit return to continue:

bash

启动后pwmconfig会让所有风扇都运转在最高转速此处按下回车之后开始对每个风扇进行识别，会调整风扇转速到最低，需要注意观察机箱中哪个风扇正在被控制

此处测试了第一个风扇控制器，在上一步Found the following fan sensors:观察到，只有2，6，7号控制器有连接风扇，此处1、3、4、5没有安装风扇，无需测试可以直接输入n跳过

Testing pwm control hwmon3/pwm1 ...
  hwmon3/fan2_input ... speed was 2732 now 2732
    no correlation
  hwmon3/fan6_input ... speed was 2119 now 2188
    no correlation
  hwmon3/fan7_input ... speed was 2596 now 2428
    no correlation

No correlations were detected.
There is either no fan connected to the output of hwmon3/pwm1,
or the connected fan has no rpm-signal connected to one of
the tested fan sensors. (Note: not all motherboards have
the pwm outputs connected to the fan connectors,
check out the hardware database on http://www.almico.com/forumindex.php)

Did you see/hear a fan stopping during the above test (n)? n

bash

输入y执行对于风扇2的测试此处尝试逐步降低风扇转速，直到风扇停转

Testing pwm control hwmon3/pwm2 ...
  hwmon3/fan2_input ... speed was 2732 now 504
    It appears that fan hwmon3/fan2_input
    is controlled by pwm hwmon3/pwm2
Would you like to generate a detailed correlation (y)? 
    PWM 255 FAN 2732
    PWM 240 FAN 2561
    PWM 225 FAN 2450
    PWM 210 FAN 2389
    PWM 195 FAN 2220
    PWM 180 FAN 2146
    PWM 165 FAN 1979
    PWM 150 FAN 1909
    PWM 135 FAN 1721
    PWM 120 FAN 1632
    PWM 105 FAN 1451
    PWM 90 FAN 1359
    PWM 75 FAN 1196
    PWM 60 FAN 1080
    PWM 45 FAN 943
    PWM 30 FAN 805
    PWM 28 FAN 772
    PWM 26 FAN 740
    PWM 24 FAN 739
    PWM 22 FAN 711
    PWM 20 FAN 682
    PWM 18 FAN 677
    PWM 16 FAN 655
    PWM 14 FAN 626
    PWM 12 FAN 607
    PWM 10 FAN 594
    PWM 8 FAN 567
    PWM 6 FAN 544
    PWM 4 FAN 547
    PWM 2 FAN 511
    PWM 0 FAN 510

bash

此处选择基于哪个温度传感器控制PWM调速此处的选项来自/sys/class/hwmon/下文件，通过观察/sys/class/hwmon<数字>/name可以知道此处对应系统哪个硬件的温度，之后通过sensors找到此温度对应的文件，选择后会通过此文件进行调速

Select a temperature sensor as source for hwmon3/pwm7:
1.  hwmon0/temp1_input 10) hwmon3/temp3_input
2.  hwmon1/temp1_input 11) hwmon3/temp4_input
3.  hwmon1/temp2_input 12) hwmon3/temp5_input
4.  hwmon1/temp3_input 13) hwmon3/temp6_input
5.  hwmon2/temp1_input 14) hwmon3/temp7_input
6.  hwmon2/temp2_input 15) hwmon3/temp8_input
7.  hwmon2/temp6_input 16) hwmon3/temp9_input
8.  hwmon3/temp1_input 17) None (Do not affect this PWM output)
9.  hwmon3/temp2_input

bash

# 风扇起转温度
Enter the low temperature (degree C)
below which the fan should spin at minimum speed (20): 50

# 最高温度
Enter the high temperature (degree C)
above which the fan should spin at maximum speed (60): 70

# 风扇停转时的pwm值
Enter the minimum PWM value (0-255)
at which the fan STOPS spinning (press t to test) (100): 50

# 风扇起转时pwm值
Enter the minimum PWM value (0-255)
at which the fan STARTS spinning (press t to test) (100): 60

bash

输入数字保存并推出之后，会生成/etc/fancontrol文件

fancontrol#

上一步生成的fancontrol的文件将用于实际调速，你也可以直接编辑此文件

Configuration file generated by pwmconfig, changes will be lost
INTERVAL=10
DEVPATH=hwmon2=devices/platform/coretemp.0 hwmon3=devices/platform/nct6775.2592
DEVNAME=hwmon2=coretemp hwmon3=nct6798

# 温度与 PWM 对应关系
FCTEMPS=hwmon3/pwm2=hwmon2/temp1_input hwmon3/pwm7=hwmon2/temp1_input hwmon3/pwm6=/var/lib/hdd_temp/max_hdd_temp.txt

# 风扇与 PWM 对应关系
FCFANS=hwmon3/pwm6=hwmon3/fan6_input hwmon3/pwm2=hwmon3/fan2_input hwmon3/pwm7=hwmon3/fan7_input

# 最低和最高温度
MINTEMP=hwmon3/pwm2=40 hwmon3/pwm7=40 hwmon3/pwm6=35
MAXTEMP=hwmon3/pwm2=70 hwmon3/pwm7=70 hwmon3/pwm6=45

# 最低启动和停止 PWM 值
MINSTART=hwmon3/pwm2=150 hwmon3/pwm7=100 hwmon3/pwm6=80
MINSTOP=hwmon3/pwm2=0 hwmon3/pwm7=24 hwmon3/pwm6=80

# 最低和最高 PWM 值
MINPWM=hwmon3/pwm7=0 hwmon3/pwm6=80
MAXPWM=hwmon3/pwm2=255 hwmon3/pwm7=255 hwmon3/pwm6=255

txt

启动fancontrol

systemctl start fancontrol
systemctl enable fancontrol

bash

查看状态fancontrol已在运行，且风扇转速已降低

root@pve:~# systemctl status fancontrol
● fancontrol.service - fan speed regulator
     Loaded: loaded (/lib/systemd/system/fancontrol.service; enabled; preset: enabled)
     Active: active (running) since Sun 2025-05-25 16:54:33 CST; 30min ago
       Docs: man:fancontrol(8)
             man:pwmconfig(8)
    Process: 741023 ExecStartPre=/usr/sbin/fancontrol --check (code=exited, status=0/SUCCESS)
   Main PID: 741205 (fancontrol)
      Tasks: 2 (limit: 38120)
     Memory: 1.4M
        CPU: 1.988s
     CGroup: /system.slice/fancontrol.service
             ├─741205 /bin/bash /usr/sbin/fancontrol
             └─763096 sleep 10

May 25 16:54:33 pve fancontrol[741205]:   Controls hwmon3/fan6_input
May 25 16:54:33 pve fancontrol[741205]:   MINTEMP=35
May 25 16:54:33 pve fancontrol[741205]:   MAXTEMP=45
May 25 16:54:33 pve fancontrol[741205]:   MINSTART=80
May 25 16:54:33 pve fancontrol[741205]:   MINSTOP=80
May 25 16:54:33 pve fancontrol[741205]:   MINPWM=80
May 25 16:54:33 pve fancontrol[741205]:   MAXPWM=255
May 25 16:54:33 pve fancontrol[741205]:   AVERAGE=1
May 25 16:54:33 pve fancontrol[741205]: Enabling PWM on fans...
May 25 16:54:33 pve fancontrol[741205]: Starting automatic fan control...
root@pve:~#

bash