[SRU][B-OEM-OSP1/D/E] reduce s2idle power consumption when BIOS uses shared power resources
Bug #1840882 reported by
AaronMa
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Critical
|
AaronMa | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Disco |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
SRU justification:
[Impact]
When system goes to suspend-to idle, it's power consumption is around 4+ w.
[Fix]
Some TBT and other ACPI devices share the same power resource, when system goes to s2idle.
PME polling thread continue bringing up devices to D0 mode.
Use cached ACPI device power state will avoid this issue.
[Test]
Verified on 2 hardware. Tests result are good.
[Regression Potential]
Medium, upstream patches cherry-picked.
Since these hareware is only supported by 5.0+ kernel, I set B-OEM-OSP1 and disco+ kernel tag.
tags: | added: oem-priority originate-from-1840880 sutton |
Changed in hwe-next: | |
assignee: | nobody → AaronMa (mapengyu) |
importance: | Undecided → Critical |
status: | New → In Progress |
Changed in linux (Ubuntu): | |
status: | Incomplete → Fix Committed |
Changed in linux (Ubuntu Disco): | |
status: | New → Fix Committed |
Changed in hwe-next: | |
status: | In Progress → Invalid |
status: | Invalid → Fix Released |
Changed in hwe-next: | |
status: | Fix Released → In Progress |
Changed in hwe-next: | |
status: | In Progress → Fix Released |
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This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1840882
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.