Hi Florin,

I haven't seen that issue yet, but I do have some more info that may be
related.

Just finished initial tests on 3.2.0-39-generic and the number of
retries are again through the roof (for hard numbers, on an 8 MB file
transfer, 325 retries with 3.2.0-32, 2020 retries with 3.2.0-39). But, I
sat down with the network team to look through the logs during the
connection drops with 3.2.0-32 and we're seeing MIC errors again:

"The AP 'kn_office_100' received a WPA MIC error on protocol '0' from
Station 'dc:85:de:8a:14:0e'. Counter measures have been activated and
traffic has been suspended for 60 seconds. - Controller Name:
kn_254_17AP"

...which leads back to a bug I'm all too familiar with:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/580753

Florin, it's possible that if you're seeing the same MIC challenge
failures that your AP is taking more hostile countermeasures at some
point (maybe the nth failure). Especially if you see that other devices
remain connected but your AR9285 won't get reconnected until the AP
reboots, I'd be tempted to point the finger at the MIC failure. But
that's just supposition on my part.

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https://bugs.launchpad.net/bugs/945379

Title:
  168c:002b Wireless connection randomly drops -- ath9k

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