changing status of autosuspend usb devices completely disables them.

[Micheal]

I'm really concerned with ubuntu power consumption and have done everything in ubuntu help pages corresponding power optimization. that included running pm-powersave and powertop. I also had some problem with my external HDD and usb devices not being even seen by OS. just turned out when I change their status in powertop Tunables from good to bad, they start working again!
the entry starts with Autosuspend for USB device ....

I'm using Ubuntu 16.10

the output of "apt-cache policy powertop" is:
powertop:
  Installed: 2.8-1build1
  Candidate: 2.8-1build1
  Version table:
...

I expected the autosuspend to intelligently disable devices if not used for a while (like 3 min at least) and also activating them again as soon as they are required...

But it just deactivate all my USB Ports. at least should be warned in
https://help.ubuntu.com/community/PowerManagement/ReducedPower
that this could happen.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: powertop 2.8-1build1
ProcVersionSignature: Ubuntu 4.8.0-39.42-generic 4.8.17
Uname: Linux 4.8.0-39-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Mar 7 21:28:00 2017
InstallationDate: Installed on 2017-02-25 (10 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
SourcePackage: powertop
UpgradeStatus: No upgrade log present (probably fresh install)

[dino99 (9d9)]

This is an unsupported release now. Please think to install the next LTS 'Bionic 18.04'

http://cdimage.ubuntu.com/ubuntu-next/daily-live/current/
https://www.omgubuntu.co.uk/2018/02/ubuntu-18-04-minimal-install-option

[Simon Quigley (tsimonq2)]

Marking as Invalid because the release is EOL is not correct. Marking as Incomplete. Also, 18.04 is (at the time of writing) still in development, and you should expect some breakage.
https://wiki.ubuntu.com/Bugs/Responses#Release_has_reached_End_of_Life_.28EOL.29

Reporter, is this still present on 17.10 or 16.04?

[Launchpad Janitor (janitor)]

[Expired for powertop (Ubuntu) because there has been no activity for 60 days.]