Comment 34 for bug 1005832

I have a similar issue, with an intel utlimate-N chipset on a lenovo T410 in an enterprise WPA setup with multiple routers. I installed linux-backports-modules-cw-3.6-precise-generic to get the latest drivers. This seems to in general improve the connection dropping I was experiencing, but still is a bit quirky. For example, network manager sometimes gets confused, and no longer show a network name even though the network is connected. Also, the connection still occaisonally hangs, though I can't be certain this is a driver issue -- could be on the router end.

~$ uname -a
Linux april-103 3.2.0-35-generic #55-Ubuntu SMP Wed Dec 5 17:42:16 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

dmesg before the upgrade:
[ 1814.888217] wlan0: direct probe to 0a:0b:0d:0e:68:0c (try 1/3)
[ 1815.084266] wlan0: direct probe to 0a:0b:0d:0e:68:0c (try 2/3)
[ 1815.284159] wlan0: direct probe to 0a:0b:0d:0e:68:0c (try 3/3)
[ 1815.484061] wlan0: direct probe to 0a:0b:0d:0e:68:0c timed out

(Now after the upgrade, dmesg is filled with compat wireless debugging statements, however)

Hope this helps!