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I'd like to be able to leave Ubuntu 12.04 running on my laptop for an extended time period. But it reboots after a while. How can I prevent that?

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ubuntu by default doesn't shutdown nor reboots on its own. Have you done any tweaks to your installation? –  Meow Dec 22 '13 at 11:09
You might want to make the question title clearer.... –  Wilf Dec 22 '13 at 11:10
i think it automatically reboots after some time. –  Avinash Raj Dec 22 '13 at 11:13
My never reboots on it's own, and I have it running all day on my laptop. Have a look in power management settings, that would be my guess... –  Alvar Dec 22 '13 at 11:30

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