This bug is awaiting verification that the linux-azure/5.15.0-1050.57
kernel in -proposed solves the problem. Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-jammy-linux-azure' to 'verification-done-jammy-
linux-azure'. If the problem still exists, change the tag 'verification-
needed-jammy-linux-azure' to 'verification-failed-jammy-linux-azure'.


If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.


See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-jammy-linux-azure-v2 
verification-needed-jammy-linux-azure

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https://bugs.launchpad.net/bugs/2031333

Title:
  Need to get fine-grained control for FAN(TFN) Participant.

Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Jammy:
  Fix Released

Bug description:
  This is a public version of the following bugs:
  https://bugs.launchpad.net/bugs/1987597
  https://bugs.launchpad.net/bugs/2027754

  ----------------

  [Feature Description]
  We need Fine-grained Control of TFN participant for enabling active 2 policy 
in Linux/chrome.

  Currently, The kernel has provided __FPS table and cur__state to
  adjust the fan level as per  _FPS table .

  But there is no option to read  *_FIF (Fan Information) and _FST (Fan
  Status).*

  Once the fine-grained control is enabled, we should be able to the set
  the control value from 0-100 through Arg0 of _FSL (Fan Set Level).

  *_FST (Fan Status)*  should report current running RPM and control
  value of the FAN(TFN).

   please refer ACPI spec for more detail.

  [https://uefi.org/specs/ACPI/6.4/11_Thermal_Management/fan-
  device.html]

  [HW/SW Information]
  Hardware: Alder Lake

  Target Release: 22.04
  Target Kernel: 5.15

  
  Merged for 5.18-rc1

  f1197343f077 ACPI: fan: Add additional attributes for fine grain control
  bea2d9868ef5 ACPI: fan: Properly handle fine grain control
  d445571fa369 ACPI: fan: Optimize struct acpi_fan_fif
  00ae053a0533 ACPI: fan: Separate file for attributes creation

  Platform-independent

  [Business Justification]
  Function enabling

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