Kubuntu Vivid slow to shut down

[Donatas G.]

Hello everyone,

I have been running Kubuntu Vivid (on Thinkpad X220t, amd64, with SSD hard
drive) for a few weeks now. Everything goes ok, but it is strange that it
takes a few minutes for the system to shut down. It takes long both if I
shut down the graphical way, and if I issue  "sudo halt -p" (independently
of whether the Plasma session is running).

I looked at what is happening during the shutdown procedure, and the
shutdown procedure stops and hangs for more than a minute at these lines:

Starting Wait for Plymouth Boot Screen to Quit...
Starting Terminate Plymouth Boot Screen...

How do I troubleshoot this problem? How do I see what is halting the
shutdown process, what is hiding behind those lines?

Would be grateful for any ideas.

Donatas Glodenis
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