Now I get the following:
$ dmesg | grep -i apst
[ 2.232133] nvme nvme0: apsta = 0, no APST
[ 2.448134] nvme 0000:04:00.0: NVME_QUIRK_NO_APST
[ 2.448135] nvme 0000:04:00.0: disabling APST.
[ 2.448137] nvme nvme0: apsta = 0, no APST
It seems like those messages are telling me that apst should be disabled?
However, I still get
sudo nvme get-feature -f 0x0c -H /dev/nvme0
get-feature:0xc (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): 50 ms
Idle Transition Power State (ITPS): 4
.................
Entry[ 1]
.................
Idle Time Prior to Transition (ITPT): 50 ms
Idle Transition Power State (ITPS): 4
.................
Entry[ 2]
.................
Idle Time Prior to Transition (ITPT): 50 ms
Idle Transition Power State (ITPS): 4
.................
Entry[ 3]
.................
Idle Time Prior to Transition (ITPT): 10000 ms
Idle Transition Power State (ITPS): 5
.................
Entry[ 4]
.................
Idle Time Prior to Transition (ITPT): 10000 ms
Idle Transition Power State (ITPS): 5
...
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https://bugs.launchpad.net/bugs/1699004
Title:
APST gets enabled against explicit kernel option
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