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[Bonzer <869635@xxxxxxxxxxxxxxxxxx>]

I got the same errors as Harald after trying the above. It was still
very slow to shutdown and sometimes didn't shutdown at all.

The only way I could previously get it to shutdown reliably was with a
"sudo shutdown -h now".

I have now found if I remove the network manager it completely fixes it.
I now have no errors and quick shutdown.

sudo apt-get remove network-manager

If I re-install the above network manager, the problem comes back. So
that is definitely the cause in my case.

I have installed "wicd" as a replacement network manager. I did this
before removing the Ubuntu supplied network manager.

I am using 11.10 that has been upgraded from 11.04. I have wired
ethernet.

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https://bugs.launchpad.net/bugs/869635

Title:
  long delay at shutdown/reboot - network-manager doesn't close
  correctly

Status in “network-manager” package in Ubuntu:
  Confirmed

Bug description:
  I've noticed the shutdown and reboot in oneiric is slower than in
  natty. This is reproducible on different machines with fresh
  installations.

  Disabling plymouth and vt.handoff=7 I can see that some processes are not closed:
  * Asking all remaining processes to terminate... [OK]
  * Killing all remaining processes... [fail]

  Killing network-manager at runlevel6, after the dbus shutdown signal,
  makes the shutdown and restart really faster (I'd say 5/10sec on low
  end machines like netbooks)


  --- /etc/init/network-manager.conf.orig 2010-05-03 14:56:09.745071317 +0200
  +++ /etc/init/network-manager.conf 2010-05-03 14:56:43.075152939 +0200
  @@ -8,6 +8,7 @@
   start on (local-filesystems
            and started dbus)
   stop on stopping dbus
  +stop on runlevel [06]

   expect fork
   respawn


  after applying this I get no more errors:
  * Killing all remaining processes... [OK]

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