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During my daily work with Ubuntu it sometimes happens that shutdown process is very slow. It takes about 10 minutes. But this happens only after about 3-4 hours of continuous work. (If I shutdown right after ubuntu start the shutdown is normal). What can be the reason? How can I see detailed information what is going on during shut down?

The syslog file contains a little information and I cannot see what causes such delay.

Also sometimes Ubuntu suddenly logs me out. This also happens after 3-4 hrs of work. I think there is a relation between these two issues.

Update. I think that it is slow because some process cannot be stopped/killed. If so, how can I determine which process?

This is the shutdown screen:

enter image description here

("Killing all remaining processes" fails)

  • I don't know, but maybe it's clearing caches and RAM? – Adrians Netlis Aug 3 '16 at 10:17

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