[Bug 2054391] Re: Fix CPU thermal sensors enumeration

[Christian Ehrhardt ]

I double checked if we also need to fix others e.g. mantic as often -dev releases in between are forgotten but they need to be fixed as well to avoid upgraders regressing.
But that looks fine

git tag --contains df8ac025d22e51c237c8ebe2aa25bf672ec04edb
v2.5
v2.5.0-pre
v2.5.1
v2.5.2
v2.5.3
v2.5.4
v2.5.5
v2.5.6
v2.5.7

vs

 thermald | 1.9.1-1build1    | focal          | source, amd64
 thermald | 1.9.1-1ubuntu0.6 | focal-updates  | source, amd64
 thermald | 1.9.1-1ubuntu0.7 | focal-proposed | source, amd64
 thermald | 2.4.9-1          | jammy          | source, amd64
 thermald | 2.4.9-1ubuntu0.4 | jammy-updates  | source, amd64
 thermald | 2.5.4-2          | mantic         | source, amd64
 thermald | 2.5.6-2build2    | noble          | source, amd64
 thermald | 2.5.7-3          | oracular       | source, amd64

So anything >= mantic is already fine having 2.5.4 there.

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https://bugs.launchpad.net/bugs/2054391

Title:
  Fix  CPU thermal sensors enumeration

Status in HWE Next:
  New
Status in thermald package in Ubuntu:
  Fix Released
Status in thermald source package in Jammy:
  Confirmed

Bug description:
  [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.

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