Power consumption during s2idle is higher than long idle (Intel SSDPEKKF)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Bionic |
Fix Released
|
Undecided
|
Unassigned | ||
Cosmic |
Fix Released
|
Undecided
|
Unassigned | ||
Disco |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
[Impact]
On new systems that facilitate s2idle, we observed the power consumption raises higher than long idle does during s2idle with Intel NVMe SSDPEKKF.
Short idle: 6
Long idle: 2
S2I: 4.8
[Fix]
Windows doesn't put nvme to D3 in modern standby, and uses its own APST feature to do the power management. To leverage its APST feature during s2idle, we can't disable nvme device while suspending, too.
So, here is what we did on the driver, 1. prevent nvme from entering D3, 2. prevent nvme from being disabled when suspending.
[Test]
Verified on the new Intel NVMe, it fixes the power consumption issue with no regression. And the power consumption decreases to 2.8W during s2idle.
[Regression Potential]
Low, the patches only applied to specific nvme module, and from our test, the system is still stable.
CVE References
tags: | added: originate-from-1802828 somerville |
Changed in linux (Ubuntu Disco): | |
status: | Incomplete → In Progress |
Changed in linux (Ubuntu Cosmic): | |
status: | New → In Progress |
Changed in linux (Ubuntu Bionic): | |
status: | New → In Progress |
tags: |
added: verification-done-bionic removed: verification-needed-bionic |
Changed in linux (Ubuntu Bionic): | |
status: | In Progress → Fix Committed |
Changed in linux (Ubuntu Cosmic): | |
status: | In Progress → Fix Committed |
tags: |
added: verification-done-cosmic removed: verification-needed-cosmic |
no longer affects: | linux (Ubuntu Xenial) |
Changed in hwe-next: | |
status: | New → Fix Released |
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 1804588
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.