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I am using Ubuntu OS for one year. Currently I am using Ubuntu 12.04LTS. When I click the shutdown button I am directed back to the login screen instead. It has become difficult to shut down.

What can I do to enable shutdown again?

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Are you able to suspend or hibernate, @Karthikeyan.k? If not, have a look at this:… – i08in Dec 29 '12 at 9:01
Is there anyway to shut it down? – Im'juz ChanYun Dec 29 '12 at 9:37
Are you logged into any other virtual terminal, at the same time? – saji89 Dec 29 '12 at 11:24

as I came to know from the google , it happens some times and will be solved by the updates . Until that ,you can shutdown your PC from the terminal with

sudo shutdown -h now 

Here's some background info: Shutdown/suspend/hibernate not working correctly

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snow do you have a link you found in google? I am interested in reading it. – don.joey Dec 29 '12 at 10:09
@Private for clarity . – Raja Dec 29 '12 at 21:55
@Private The link has been added if you are still interested. – Seth Feb 8 '13 at 14:54

Press AltF1 (or F2, F3, F4, etc.) to open a text terminal.

Login, using a user and password with sudo rights.

Then just type:

sudo shutdown -P now

This forces a halt and power-down.

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Use poweroff command or init 0 to shutdown the system

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