[Bug 1438612] Re: remote file systems hang on shutdown, D-BUS stops too early

[Tim Passingham]

Adam, can you confirm what link you have in pre-down?  I created a link
in pre-down.d called pre-down pointing to nfs.sh in the higher
directory.  When I included this script (on ubuntu 16.04), in systog I
get messages like:

root: ********************** NetworkManager dispatch script nfs, IF=none
STATUS=hostname

(after trying to bring up my wifi device which is disabled)

And:

root: ********************** NetworkManager dispatch script nfs,
IF=enp2s0 STATUS=up

(on bring up my ethernet network)

But never a Status=pre-down

I am using autofs, but I'm not sure if that's the same as using 'systemd
automount fstab'

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Title:
  remote file systems hang on shutdown, D-BUS stops too early

Status in D-Bus:
  Won't Fix
Status in dbus package in Ubuntu:
  Fix Released

Bug description:
  (part of bug 1431774). During shutdown, D-Bus stops too early. In
  particular, it stops before NetworkManager and remote-fs.target,  so
  that any network unmount  will cause errors and hang the boot. This
  can be seen with

  $ journalctl -b -1 | egrep 'Stop.*(D-Bus|Network M|Remote F)'
  Mär 30 19:05:19 donald systemd[1]: Stopping D-Bus System Message Bus...
  Mär 30 19:05:19 donald systemd[1]: Stopped D-Bus System Message Bus.
  Mär 30 19:05:19 donald systemd[1]: Stopped target Remote File Systems.
  Mär 30 19:05:19 donald systemd[1]: Stopping Remote File Systems.
  Mär 30 19:05:19 donald systemd[1]: Stopped target Remote File Systems (Pre).
  Mär 30 19:05:19 donald systemd[1]: Stopping Remote File Systems (Pre).
  Mär 30 19:05:19 donald systemd[1]: Stopping Network Manager...
  Mär 30 19:05:42 donald systemd[1]: Stopped Network Manager.
  Mär 30 19:05:42 donald systemd[1]: Stopping D-Bus System Message Bus Socket.

  A quick workaround is to add After=dbus.service to
  /lib/systemd/system/NetworkManager.service's [Unit] section, but this
  should be fixed in a more general fashion.

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