Hi Kai-Heng, thanks!
Overnight I've used `nvme_core.default_ps_max_latency_us=0` in GRUB with
no read-only crashes (everything has been smooth). I left the machine
awake all night, I've since suspended & awoken it twice, all seems to be
ok.
As expected all APSTE is disabled:
`
$ sudo nvme get-feature -f 0x0c -H /dev/nvme0
get-feature:0xc (Autonomous Power State Transition), Current value:00000000
Autonomous Power State Transition Enable (APSTE): Disabled
Auto PST Entries .................
Entry[ 0]
.................
Idle Time Prior to Transition (ITPT): 0 ms
Idle Transition Power State (ITPS): 0
.................
Entry[ 1]
.................
Idle Time Prior to Transition (ITPT): 0 ms
Idle Transition Power State (ITPS): 0
.................
...
`
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https://bugs.launchpad.net/bugs/1678184
Title:
APST quirk needed for Samsung 512GB NVMe drive
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