[SOLVED] Driver for Asus B450 motherboard to enable LM Sensors / other boards

[shag00]

I recently purchased a new Ryzon 2600X with an Asus B450 Plus motherboard and was disappointed when I discovered that the Ubuntu kernel did not support this motherboard. I have installed a driver and found it is about 85% effective, eg the the fan min/max temps are incorrect but current temp seems OK. Basically what I have done is to create a module that the kernel can access which is like a supplement to a book, it does not change the kernel but uses DKMS https://en.wikipedia.org/wiki/Dynami...Module_Support

Now it is important to note I have no knowledge of what is going on technically but I have done it and it works with no issues. I have relied on advice from a guy named Temüjin from Ubuntu forums for most of the commands. This is specifically what I did for my Asus B450 board but if you can find a driver I imagine the process will work for any motherboard. This post is as much for my future reference as it is for people with the same problem.

Step 1. Identify your chipset that provides the information to lm-sensors.

$ sudo dmidecode -t 34

Step 2. Find a driver for your chipset. In my case my chipset is a ITE IT8665E which uses the IT87 driver. https://github.com/a1wong/it87/blob/master/it87.c

Step 3. Enter the following 7 commands sequentially:

echo "it87" | sudo tee -a /etc/modules           
sudo apt-get install git dkms build-essential linux-headers-generic         #you may have some of these already 
cd ~/                                                                       #can use whichever directory you want
git clone https://github.com/a1wong/it87.git
cd it87/
sudo make dkms
sensors

Super simple and works, you will now be looking at your sensor output. This process creates a folder /sys/module/it87. There are 2 options to reverse the process:
1.

cd ~/it87
sudo make dkms_clean

or 2.
remove the line "it87" from /etc/modules and /etc/modules-load.d/modules.conf (these are both the same file, changing 1 changes both)

BEFORE:

angel@angelpc:~$ sensors
k10temp-pci-00c3
Adapter: PCI adapter
temp1:        +30.1°C  (high = +70.0°C)
asus-isa-0000
Adapter: ISA adapter
cpu_fan:        0 RPM

AFTER:

angel@angelpc:~$ sensors
asus-isa-0000
Adapter: ISA adapter
cpu_fan:        0 RPM

it8665-isa-0290
Adapter: ISA adapter
in0:          +0.74 V  (min =  +2.75 V, max =  +2.77 V)  ALARM
in1:          +2.53 V  (min =  +1.25 V, max =  +1.65 V)  ALARM
in2:          +2.06 V  (min =  +2.08 V, max =  +1.38 V)  ALARM
in3:          +2.04 V  (min =  +2.50 V, max =  +0.58 V)  ALARM
in4:          +0.03 V  (min =  +1.70 V, max =  +2.40 V)  ALARM
in5:          +0.03 V  (min =  +2.68 V, max =  +2.76 V)  ALARM
in6:          +0.03 V  (min =  +1.00 V, max =  +1.70 V)  ALARM
3VSB:         +3.36 V  (min =  +1.50 V, max =  +4.75 V)
Vbat:         +3.29 V  
+3.3V:        +3.36 V  
fan1:        1493 RPM  (min =   15 RPM)
fan2:        1326 RPM  (min =   24 RPM)
fan3:        1917 RPM  (min =  164 RPM)
fan4:        1917 RPM  (min =   -1 RPM)
fan6:           0 RPM  (min =   -1 RPM)
temp1:        +36.0°C  (low  = -73.0°C, high = -73.0°C)  ALARM
temp2:        +32.0°C  (low  = -67.0°C, high = -37.0°C)  ALARM  sensor = thermistor
temp3:        +34.0°C  (low  = +110.0°C, high =  -5.0°C)  ALARM  sensor = thermistor
temp4:        +34.0°C  (low  = -75.0°C, high = +57.0°C)  sensor = thermistor
temp5:        +34.0°C  (low  = -82.0°C, high = +87.0°C)  sensor = thermistor
temp6:        +34.0°C  (low  = -117.0°C, high = -37.0°C)  ALARM  sensor = thermistor
intrusion0:  ALARM

k10temp-pci-00c3
Adapter: PCI adapter
temp1:        +43.0°C  (high = +70.0°C)

There is really no point to run sensors-detect because it will come back that it has detected a sensor (lm78) with a 60% reliability however it is not correct. It will just give you a line: CPU Fan: 0RPM.

So the end result, my Psensors display: