*** This bug is a duplicate of bug 1193639 ***
    https://bugs.launchpad.net/bugs/1193639

I don't know if this is still an issue. Due to my eeePC with infamous
cedarview-debacl i am forced to use ubuntu 12.04 with kernel 3.2.0-82.

I had the same issue. A possible fix might be setting the Atheros
Wireless card to allow Power Saving Option. How it is done, can be found
here.

http://www.linuxquestions.org/questions/linux-laptop-and-netbook-25
/update-to-kernel-3-13-removed-ability-to-set-powersave-on-
ar9462-ath9k-4175499101/

This is not 100% confirmed, but for now it seems to help
*fingerscrossed*

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https://bugs.launchpad.net/bugs/929111

Title:
  Repeated freezes when running on battery power

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