Need to get fine-grained control for FAN(TFN) Participant.
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Invalid
|
Undecided
|
Philip Cox | ||
Jammy |
Fix Released
|
Medium
|
Philip Cox |
Bug Description
This is a public version of the following bugs:
https:/
https:/
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[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:/
[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-
[Business Justification]
Function enabling
CVE References
Changed in linux (Ubuntu Jammy): | |
assignee: | nobody → Philip Cox (philcox) |
status: | New → Confirmed |
status: | Confirmed → Triaged |
status: | Triaged → In Progress |
Changed in linux (Ubuntu): | |
status: | New → In Progress |
Changed in linux (Ubuntu Jammy): | |
importance: | Undecided → Medium |
Changed in linux (Ubuntu): | |
status: | In Progress → Invalid |
Changed in linux (Ubuntu Jammy): | |
status: | In Progress → Fix Committed |
tags: |
added: verification-done-jammy removed: verification-needed-jammy-linux |
tags: |
added: verification-done-jammy-linux removed: verification-done-jammy |
tags: | added: kernel-daily-bug |
This bug is awaiting verification that the linux/5.15.0-85.95 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' to 'verification- done-jammy- linux'. If the problem still exists, change the tag 'verification- needed- jammy-linux' to 'verification- failed- jammy-linux' .
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!