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.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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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:
New
Status in linux package in Ubuntu:
Incomplete
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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