Public bug reported:

x470-I ROG strix motherboard and Ryzen 2700

After 
sudo sensors-detect 
and answering yes to all the probes the net result is: 
"Sorry, no sensors were detected.
Either your system has no sensors, or they are not supported, or
they are connected to an I2C or SMBus adapter that is not
supported."

sensors output lists: 
asus-isa-0000
Adapter: ISA adapter
cpu_fan:        0 RPM

nouveau-pci-0900
Adapter: PCI adapter
fan1:           0 RPM
temp1:        +65.0°C  (high = +95.0°C, hyst =  +3.0°C)
                       (crit = +105.0°C, hyst =  +5.0°C)
                       (emerg = +135.0°C, hyst =  +5.0°C)

k10temp-pci-00c3
Adapter: PCI adapter
temp1:        +94.2°C  (high = +70.0°C)

Where the cpu fan is patently wrong and the k10temp likewise. The
nouveau-pci-0900 appears to be the actual CPU temperature.

May be related to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1740736


Other info: 
Description:    Ubuntu 18.04 LTS
Release:        18.04

version log: 
Ubuntu 4.15.0-22.24-generic 4.15.17

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: x470

** Patch added: "lscpci output"
   
https://bugs.launchpad.net/bugs/1774817/+attachment/5147971/+files/lspci-vnvn.log

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https://bugs.launchpad.net/bugs/1774817

Title:
  Temperature sensors on x470 not reporting correctly

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