[Bug 1578015] Re: Yet another system hangs at shutdown (16.04)

[Martin Pitt]

Does the machine power off correctly if you close all your applications,
and then do

  sync; sudo poweroff -f

This will directly tell the kernel to power off, without any userspace
action in between. Hence the closing of applications and "sync" to write
any outstanding data to the disk. You will also get an fsck on the next
boot.

If that still does not power off the machine, this is a kernel problem
(which I suspect as you get to the "powering off" line).

Thanks!

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Title:
  Yet another system hangs at shutdown (16.04)

Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  Yet another of the annoying "system hangs at shutdown" bug reports. A
  fresh complete install of 16.04. Just like the others, gets down to:

  Reached target shutdown

  then stops. I've tried all the workarounds discussed, including
  swapoff -a, before shutdown attempt, etc. No joy. Have to hold power
  switch for hard shutdown very time.

  One observation of possible value. I also very recently installed
  16.04 server on two other identical boxes. Neither of them exhibit
  this problem and both shut down cleanly. Only this system, which is a
  16.04 desktop version -- again on an identical box -- is having this
  problem.

  Frankly, it's stuff like this that makes my efforts to move ordinary
  consumers over to Linux very difficult!

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