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[GiuseppeVerde <548992@xxxxxxxxxxxxxxxxxx>]

I have solved this problem in hardware.

My card (Intel 5300 AGN) has three ports for antennas.  It is a 3-way
MIMO setup, and therefore requires all three antennas to be attached in
order to be fully effective.  It shipped in my laptop with just one
antenna attached.

My laptop had trouble connecting and staying connected to various
universities' wifi networks (perhaps due to having a number of APs to
choose from; they might also be MIMO (I don't know whether they are or
not) and any n-networks.  It showed these symptoms.

Thankfully, my laptop vendor was tracking down the problems and shipped
me several antennas to try out.  Two made things better but still not
perfect; three was perfect and fixed the issues (even though they're
currently poorly placed).

So check your wifi cards!  Maybe it'll work for you too.

-- 
Wireless connection frequently drops  [deauthenticating by local choice (reason=3)]
https://bugs.launchpad.net/bugs/548992
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