Verified on 4.4.0-117-generic, APST was enabled.
#sudo nvme get-feature -f 0x0c -H /dev/nvme0n1
get-feature:0x0c (Autonomous Power State Transition), Current value: 0x000001
Autonomous Power State Transition Enable (APSTE): Enabled
Auto PST Entries .................
Entry[ 0]
.................
Idle Time Prior to Transition (ITPT): 1500 ms
Idle Transition Power State (ITPS): 3
.................
Entry[ 1]
** Attachment added: "nvme-get-feature.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1664602/+attachment/5087978/+files/nvme-get-feature.log
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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https://bugs.launchpad.net/bugs/1664602
Title:
Using an NVMe drive causes huge power drain
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