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I am unable to reboot or shutdown from lightdm. When I click on the button "Shutdown" or "Reboot" in the pop-ups simply nothing happens.

I cannot find nothing wrong in /var/log/lightdm/lightdm.log

Anyone can help me?

Thanks in advance.

share|improve this question
Maybe there is another user logged in ? A bug for this behavior exists already. – NikTh Sep 3 '13 at 10:07
No other users active. It happens even after a fresh reboot. Thanks. – Gius1982 Sep 3 '13 at 10:22
Then I would suggest to report a bug ubuntu-bug lightdm and let the developers to deal with it. – NikTh Sep 3 '13 at 10:30
Ok...sorry for the stupid ubuntu-bug a mailing list? – Gius1982 Sep 3 '13 at 10:33
I got it is a CLI command...thanks. – Gius1982 Sep 3 '13 at 11:35

Try to reconfigure lightdm, it may fix your issue

  • Open terminal(CTRL+ALT+T) and execute following command:

    sudo dpkg-reconfigure lightdm
  • Then chose lightdm from the list.

  • Restart your system:

    sudo reboot now

It may fix your issue. If doesn't fix then follow 2nd Method.

Method 2:

Installing a new display manager can fix your problem. Steps to install GDM(a display manager much like lightdm):

  • Open terminal(CTRL+ALT+T) and execute following commands:

    sudo apt-get install gdm
    sudo dpkg-reconfigure lightdm

    then choose gdm from the list. And restart your system:

    sudo reboot now

Hope these methods might solve your issue. Reply for further assistance.

share|improve this answer
sudo dpkg-reconfigure lightdm tried but the problem is still there. As to gdm concerns I'm not really taking into consideration to change the default display manager. Thanks for your reply. – Gius1982 Sep 3 '13 at 10:20
It depends on you!! Actually installing gdm will not change any settings, it will install one extra display manager, that's all. You can switch to any display manager at any time without any trouble. Just you have to run this command every time you want to switch: sudo dpkg-reconfigure lightdm. Believe me, you will never be in trouble.. :) – Saurav Kumar Sep 3 '13 at 10:23
Not scared, simply I'd like to solve the problem instead that circumnavigate it. ;) – Gius1982 Sep 3 '13 at 10:32
Okay! As your wish. But if you tried, it would help to find whether that bug was in lightdm or something else. You can later remove completely gdm by executing these commands: sudo apt-get autoremove gdm and sudo apt-get --purge remove gdm. Any way I marked your question as Favorite and also liked it so that it would attract other helper to find the solution. – Saurav Kumar Sep 3 '13 at 10:37
Tried GDM, shutdown and reboot not working and I can't login either. – Gius1982 Sep 3 '13 at 11:34

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