This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
yakkety' to 'verification-done-yakkety'. If the problem still exists,
change the tag 'verification-needed-yakkety' to 'verification-failed-

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See for documentation how
to enable and use -proposed. Thank you!

** Tags added: verification-needed-yakkety

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  Using an NVMe drive causes huge power drain

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Released

Bug description:
  PCIe NVMe drives are very common in new laptops. The Zesty's kernels 
(including latest 4.10 rc8 from CKT PPA) does not support APST (autonomous 
power state transitions). A patch does exist :

  It seems that we cannot expect this before kernel 4.11.

  Additionally my laptop CPU does never go under PC3 power saving state, 
powertop says. I don't know if it's related.
  ApportVersion: 2.20.4-0ubuntu2
  Architecture: amd64
   /dev/snd/controlC0:  ft         1900 F.... pulseaudio
  CurrentDesktop: GNOME
  DistroRelease: Ubuntu 17.04
  HibernationDevice: RESUME=UUID=a04b55bf-b1b6-464c-88ce-44b6adbbbc10
  InstallationDate: Installed on 2016-12-12 (63 days ago)
  InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Alpha amd64 (20161211)
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. Precision 7510
  Package: linux (not installed)
   PATH=(custom, no user)
   0 nouveaufb
   1 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-8-generic 
root=UUID=0d1f213e-73a9-4097-ae64-9cd963cfba23 ro quiet
  ProcVersionSignature: Ubuntu 4.10.0-8.10-generic 4.10.0-rc8
   linux-restricted-modules-4.10.0-8-generic N/A
   linux-backports-modules-4.10.0-8-generic  N/A
   linux-firmware                            1.163
  Tags:  zesty
  Uname: Linux 4.10.0-8-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True 12/22/2016
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.9.5 0YH43H
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
dmi:bvnDellInc.:bvr1.9.5:bd12/22/2016:svnDellInc.:pnPrecision7510:pvr:rvnDellInc.:rn0YH43H:rvrA00:cvnDellInc.:ct9:cvr: Precision 7510
  dmi.sys.vendor: Dell Inc.

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