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This is the error message I get when trying to logout or shutdown from the menu in Xubuntu 16.04 on my Dell laptop.

Interestingly when I choose "Log Out..." from the actions menu the first time nothing happens, but if I try it again then do I get the Session manager must be in idle state when requesting a shutdown error dialog.

I have tried the answers here and here and some others from google to no avail.

I am able to shutdown by running sudo shutdown now from the terminal.

Not sure how to proceed.

Imran
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2 Answers2

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The same thing happend with me today, it was the first time:

I've decided to go to the terminal mode by ctrl+alt+f1 and then find out the process id of session manager, by 'pidof xfce-session' then close it with 'kill -9 ID'. Then it started working fine.

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Upgrading from 16.04 to 16.10 fixed the issue.

Imran
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    I'm having this same issue with a fresh install of 17.04. Although my home directory is from older versions. – deltaray Oct 23 '17 at 11:22
  • @deltaray I had this issue in Xubuntu 18.04 after removing some packages (by sudo aptitude purge ~o). Reinstalling nvidia driver in "Additional Drivers" tab in "Software & Updates" dialog fixed it. – jarno Apr 19 '19 at 08:03
  • problem still exists in 18.04 – markling Apr 08 '20 at 13:08