From: Anton Meyninger <anton.meyninger@gmail.com>
Subject: Notebook freezes when on battery
Newsgroups: comp.os.linux.misc
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Date: 13 Jul 2011 09:50:24 +0100
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Hi,
I am using Ubuntu 11.04 x64 with the default Desktop and I have the 
following problem: As soon as I take out my power cable and my notebook 
runs on battery, it freezes within ten seconds. Then, I can't use my 
mouse any more. Putting the cable back in doesn't work, so I have to 
"hard shutdown" and reboot.
Do you know what could cause that behaviour?

Thanks,
Anton