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Ubuntu keeps completely draining my battery when it is in suspend mode and the lid is closed, I suspect this may be a problem, as it has happened (occasionally) on two of my laptops both running 12.04. Where I will shut the lid, putting it in suspend mode, and come back in a day or two and find my battery at 0%.

In power management, both of my computers are set to suspend when the lid is closed.

Is there some kind of advanced power management scheme where I can tell my computer to suspend when the lid is closed, and then after some time or at some battery level go to shutdown state?

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Here you go: askubuntu.com/questions/145443/… –  mikewhatever Oct 13 '13 at 19:26
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