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In both Ubuntu 10.04 and 12.04, a perfectly happy sleeping laptop is woken when moved. Either the HD-shock detection, the trackpad or a sloppy key will wake it when the lid is closed.

To test this I suspended the computer and left it for 5-10 minutes where it slept nicely with the lid open. Then pressing the Fn-key would wake it in 12.04. In sleep mode with the lid closed, moving the laptop wakes it. Sometimes it immediately goes back to sleep, but not always. It's a laptop and I put it in a bag to carry to and from work, so being asleep is kind of important.

I'm hoping someone can suggest a way to debug.

Thanks!

Mike

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up vote 0 down vote accepted

I think my hinge for the display was weak or loose and the open lid event was causing it to resume. I disabled it with this:

How to prevent resume from sleep/suspend on lid open?

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