Thermal shutdown by kernel or by BIOS?

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  Temperature sensors on x470 not reporting correctly

Status in linux package in Ubuntu:

Bug description:
  x470-I ROG strix motherboard and Ryzen 2700

  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

  sensors output lists:
  Adapter: ISA adapter
  cpu_fan:        0 RPM

  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)

  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:

  Other info:
  Description:  Ubuntu 18.04 LTS
  Release:      18.04

  version log:
  Ubuntu 4.15.0-22.24-generic 4.15.17

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