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Since I installed my brand new Ubuntu Server 12.04 it keeps rebooting every time I try to power it off. It shuts down and after 3-4 seconds it boots again. I also tried sudo shutdown -hP now and searched for similar posts but the solutions didn't help. How can I solve this problem? Thanks in advance.

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How do you power off the machine? Pull the power cable? If, so does it come on its self or do you have to press the power button? If so, the first thing I would think of is a hardware issue. Power button, maybe reset button. You can try sudo apt-get install laptop-mode-tools to enable laptop mode. or have a look at this page <a>help.ubuntu.com/community/Boot-Repair</a>; –  BiggJJ May 29 '13 at 20:00
    
Did, for some obseen reason, you push Ctrl+Alt+Delete while it was shutting down (showing the Ubuntu logo + the four dots? –  RPi_Awesomeness May 29 '13 at 20:06
    
Does sudo shutdown -h now work? –  fedorqui May 29 '13 at 20:53
    
@BiggJJ: I switch off the extension cable within those 3-4 seconds when the machine is powered off. –  Sceptical Jule May 29 '13 at 22:12
    
@RPi Awesomeness: No. –  Sceptical Jule May 29 '13 at 22:15

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