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I am on Xubuntu 12.10. When I close my laptop lid, the screen goes black as normal, and the normal login window appears when I open it up again. However, I notice that for example, I left my laptop closed for no more than about 45 mintues, yet my battery had drained more than 30%. The same thing happened to me the previous night, where I left my laptop lid closed the whole night at around 50, 60%, yet dead by morning. I use xscreensaver. Are there any settings I need to change? I have no background processes running as far as I know.

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Welcome to Ask Ubuntu! Your laptop keeps running when you close the lid. Perhaps you want to reconfigure it to suspend (sleep) automatically when you close the lid? –  gertvdijk Feb 9 '13 at 22:50
    
edit: thank you, suspend worked perfectly with no battery drain. –  anon Feb 10 '13 at 5:51

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