** Changed in: linux (Ubuntu)
Status: Incomplete => Fix Committed
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https://bugs.launchpad.net/bugs/1840882
Title:
[SRU][B-OEM-OSP1/D/E] reduce s2idle power consumption when BIOS uses
shared power resources
Status in HWE Next:
In Progress
Status in linux package in Ubuntu:
Fix Committed
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.
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