just verified this case on intel glk , platform pci subsystem ID = 08AF with 2 
ways to heating CPU:
 - $ stress -c 20
 - $ sudo stress-ng --ignite-cpu --cpu 4

with thermald 1.7.0-5ubuntu5 + kernel 4.15.0-1065-oem , the thermald
looks work well and the system was not shut down by overheating.

refer to the attached log from thermald with `--loglevel=debug`.

by monitoring sensors in /sys/class/thermal/, the temperature is keep
closing to critical (95 degree), but thermald will always cool it on
time.

So, I will mark this issue as invalid.

** Attachment added: "thermal.log"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1853701/+attachment/5307654/+files/thermal.log

** Changed in: oem-priority
       Status: New => Invalid

** Changed in: oem-priority/bionic
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1853701

Title:
  thermald not works on intel GeminiLake

Status in OEM Priority Project:
  Invalid
Status in OEM Priority Project bionic series:
  Invalid
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  After the patch landed by "LP: #1851506 Add GeminiLake support on
  Intel int340x thermal device"

  The thermal zone "TCPU" is corretly created, but thermald still not
  work as expected on bionic so system will shutdown by cpu stress test.

  But thermald 1.9 works well with patched kernel, so it might some
  patches needed for thermald 1.7 on bionic.

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