[Bug 2054391] [NEW] Fix CPU thermal sensors enumeration

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Kai-Heng Feng (kaihengfeng):

[Impact]
Some CPU sensors are not enumerated, this can make thermald deviates from the correct behavior of the CPU TDP.

[Fix]
Traverse all sensors under hwmon sysfs directory to make sure everything is enumerated.

[Test]
Check the output of thermald. Once the fix is in place, thermal zones that are previously omitted now shows up:
[INFO]Zone 1: AMBF, Active:1 Bind:1 Sensor_cnt:1

[Where problems could occur]
Since the new logic traverse the whole hwmon sysfs, the startup time can take slightly longer.

** Affects: hwe-next
     Importance: Undecided
         Status: New

** Affects: thermald (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: thermald (Ubuntu Jammy)
     Importance: Medium
         Status: Confirmed


** Tags: oem-priority originate-from-2050867 somerville
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Fix  CPU thermal sensors enumeration
https://bugs.launchpad.net/bugs/2054391
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