====== Ubuntu - Hardware - sensors ======

**lm_sensors** is a set of hardware monitoring user space utilities.

They are helpful for tracking temperature, fan, and voltage data.

----

===== Requirements =====

==== Kernel ====

I2C support is needed along with the following kernel options:

<code bash>
KERNEL Enable I2C_CHARDEV and hardware Monitoring support in the kernel

Device Drivers  --->
    -*- I2C support  --->
        <*>   I2C device interface
    <*> Hardware Monitoring support  --->

        Select a driver, e.g.:
        [*] Intel Core/Core2/Atom temperature sensor (coretemp)
</code>

----

===== sensors-detect =====

sensors-detect (/usr/sbin/sensors-detect) can be used to find available sensors and associated kernel modules:

<code bash>
sudo sensors-detect
</code>

<WRAP info>

**NOTE:**  Follow the instructions.

  * It will probe which sensors are available and load the relevant kernel modules.
  * The final question will allow you to write a config file in **/etc/modules-load.d** that contains the kernel modules that need to be loaded.
    * This will only work if the modules-load runscript is started, add it to the default runlevel if necessary.

  * If you use **/etc/conf.d/modules** to declare which kernel modules to load simply add the necessary kernel modules as shown by sensors-detect to it. 


</WRAP>

----

===== sensors =====

<code bash>
sensors
</code>

returns:

<code bash>
k10temp-pci-00c3
Adapter: PCI adapter
Tctl:         +52.2°C  
Tccd1:        +40.8°C  
Tccd2:        +41.8°C  

enp4s0-pci-0400
Adapter: PCI adapter
PHY Temperature:  +59.9°C  
MAC Temperature:  +59.4°C  

acpitz-acpi-0
Adapter: ACPI interface
temp1:        +16.8°C  (crit = +20.8°C)

iwlwifi_1-virtual-0
Adapter: Virtual device
temp1:        +42.0°C  

amdgpu-pci-0c00
Adapter: PCI adapter
vddgfx:      421.00 mV 
fan1:          89 RPM  (min =    0 RPM, max = 3000 RPM)
edge:         +46.0°C  (crit = +100.0°C, hyst = -273.1°C)
                       (emerg = +105.0°C)
junction:     +52.0°C  (crit = +110.0°C, hyst = -273.1°C)
                       (emerg = +115.0°C)
mem:          +60.0°C  (crit = +108.0°C, hyst = -273.1°C)
                       (emerg = +113.0°C)
PPT:          23.00 W  (cap = 303.00 W)

nvme-pci-0100
Adapter: PCI adapter
Composite:    +39.9°C  (low  = -273.1°C, high = +81.8°C)
                       (crit = +84.8°C)
Sensor 1:     +39.9°C  (low  = -273.1°C, high = +65261.8°C)
Sensor 2:     +46.9°C  (low  = -273.1°C, high = +65261.8°C)
</code>