Ubuntu
linux package

  1. Bug #1678184
  2. Comment #30

Comment 30 for bug 1678184

Revision history for this message
Nils (maeher) wrote :

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.