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My ubuntu is slow to shutdown, and the culprits seem to be modemmanager and something called nm-dispatcher.action.

On shutdown I get a message on the terminal saying something like "asking all remaining processes to terminate" and then there is a ~5 second delay, before unresponsive processes are forcibly killed.

One of them was modem-manager, and I don't have a modem so I fixed that one with simply sudo apt-get remove modemmanager and there doesn't appear to be any side effects.

The other one is something like "nm-dispatcher.action: Caught signal 15, shutting down. ..." which I was able to fix by removing network-manager and network-manager-gnome. But then, obviously, I don't get the network manager icons and stuff which I need in gnome-shell. I have tried wicd as a replacement, but it is not working to my liking.

So how can I prevent those processes from hanging during shutdown?

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up vote 6 down vote accepted

Here is the bug report on, no sign of a fix.

The report does mention an edit one can make to /etc/init/network-manager.conf, ie. add as shown

stop on runlevel [06]  

I believe adding the line was effective here though myself use Wicd & have removed network-manager. YMMV, if trying & it causes issues then remove the added line

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Thanks, that seems to have done the trick! – wim Dec 14 '11 at 22:52

I haven't tried the ideas mentioned above (because I wasn't aware of them at the time), but I did try the fix mentioned at which worked well for me. Now Oneiric shuts down much faster than before.

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