###Update, this has not resolved the issue. sorry.
I am also experiencing the same it issue on Maverick. The ath9x driver could be the issue. I have tried the latest main line kernel and it seems to have resolved the issue.
The mainline can be found here
https://wiki.ubuntu.com/Kernel/MainlineBuilds
However you could run into more issues using it.
I also made an attempt to build the latest kernel from kernel.org. For some reason that didn't resolve the issue.
You can also try the backports method which might be a little better then using the mainline kernel
That can be found here
http://ubuntuforums.org/showthread.php?t=1205318
I hope this is helpful.
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