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I done my below option in my netbook Acer Aspire One D260 netbook version.

  1. I tried to upgrade my Ubuntu version from 11.10 to 12.04. Unfortunately it was stopped due to my internet disconnect.
  2. I tired to kill all the process using system monitor tool (select all process and press end process).

After above all those action my system not responding whenever I tried to shut down or log out.
I tried in terminal window using shutdown -h now command, but it tells that need to be root. But hibernate and suspend options are working fine.

Can anyone guide me how to solve this issue? Thanks in advance!

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Use sudo shutdown -h now instead of shutdown -h now to execute the command as root. – Radu Rădeanu May 13 '13 at 12:25

To fix it, you must to edit grub file as follow: Type in terminal:

  1. Type in terminal: sudo -H gedit /etc/default/grub
  2. Find the line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
  3. Change this to: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=force"
  4. Save and close the file.
  5. Finally, in terminal: sudo update-grub and sudo reboot.
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Dear friends, tried above steps but i got reply as" command not found". is any other possibility of solution there? – Ram May 15 '13 at 2:28
@Ramanathan94 Which command? – Radu Rădeanu May 15 '13 at 5:20
i tried with this commends in terminal window"sudo gedit /etc/default/grub". i got an answer as " command not found" – Ram May 15 '13 at 16:28

You have to use sudo to execute the command as root:

sudo shutdown -h now
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I tried "sudo shutdown -h now" comments. i am getting no comments found answer in terminal window – Ram May 15 '13 at 2:31
Hi All,now my netbook responding the comments "sudo shutdown -h now".i can able to shutdown my system.But how long should I use this comments. every time use this comments is not fair for Ubuntu. is any permanent solution there to rectify this issue? – Ram May 28 '13 at 1:09
What do you mean by "it is not fair for Ubuntu?". This is the proper way to shut down an Ubuntu system via command line. – André Stannek May 28 '13 at 7:16
i mean to say is, usually i shunting down using "shutdown" command from power menu. now every time i am using terminal window. I feel its tedious. do u knew how to rectify this issue – Ram May 29 '13 at 13:59
So the shutdown option is not working at all anymore, even after reboot? If so you should ask a new question instead of discussing this in the comments. – André Stannek May 29 '13 at 14:07

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