Hm, ok I seem to be unable to disable APST. :(
In '/etc/default/grub', I have
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nvme-
core.nvme_core.default_ps_max_latency_us=0"
and I get
cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-4.10.0-19-generic.efi.signed
root=UUID=365f1a9c-9598-4ad5-a387-d02f771767a1 ro quiet splash
nvme-core.nvme_core.default_ps_max_latency_us=0 vt.handoff=7
but when I try to confirm that it's disabled, I 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 .................
Not sure if I'm doing something wrong.
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https://bugs.launchpad.net/bugs/1678184
Title:
APST quirk needed for Samsung 512GB NVMe drive
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