PC SN720 NVMe WDC 256GB consumes more power in S2Idle than during long idle
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Bionic |
Fix Released
|
Medium
|
Unassigned | ||
Cosmic |
Fix Released
|
Medium
|
Unassigned | ||
linux-oem (Ubuntu) |
Fix Released
|
Undecided
|
AceLan Kao | ||
Bionic |
Fix Released
|
Medium
|
Unassigned |
Bug Description
[Impact]
On new systems that facilitate s2idle, we observed the power consumption raises higher than long idle does during s2idle with Western Digital PC SN720 NVMe SSD SDAPNTW-256G.
Short idle: 5.3
Long idle: 3.0
S2I: 5.07
[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 WD NVMe, it fixes the power consumption issue with no regression. And the power consumption decreases to 1.66W during s2idle.
[Regression Potential]
Low, the patches only applied to specific nvme module, and from our test, the system is still stable.
summary: |
- PC SN720 NVMe WDC 256GB consumes more power in S2Idle than long idle + PC SN720 NVMe WDC 256GB consumes more power in S2Idle than during long + idle |
Changed in linux-oem (Ubuntu): | |
status: | In Progress → Fix Committed |
tags: |
added: verification-done-bionic removed: verification-needed-bionic |
Changed in linux-oem (Ubuntu Cosmic): | |
importance: | Undecided → Medium |
Changed in linux-oem (Ubuntu Bionic): | |
importance: | Undecided → Medium |
no longer affects: | linux-oem (Ubuntu Cosmic) |
Changed in linux (Ubuntu Bionic): | |
importance: | Undecided → Medium |
Changed in linux (Ubuntu Cosmic): | |
importance: | Undecided → Medium |
Changed in linux-oem (Ubuntu Bionic): | |
status: | New → Fix Released |
Changed in linux-oem (Ubuntu): | |
status: | Fix Released → Invalid |
Changed in linux (Ubuntu Bionic): | |
status: | New → Fix Committed |
Changed in linux (Ubuntu Cosmic): | |
status: | New → Fix Committed |
Changed in hwe-next: | |
status: | New → Fix Released |
tags: | added: cscc |
Node SN Model Namespace Usage Format FW Rev ------- ------ ------- ------- ------- ------- ------- ----- --------- ------- ------- ------- ----- ---------------- --------
---------------- -------
/dev/nvme0n1 182940620027 PC SN720 NVMe WDC 256GB 1 256.06 GB / 256.06 GB 512 B + 0 B 10101012