Sorry -- there's just really nothing in that bug report that supports
this. If you can, please test with a different card or whatnot, but
there's still no reason to believe a success might then be because it's
the different card. Didn't you mention you sometimes successfully
connect?

Stating the description: "when I can connect, the connection is
flawless. But very often I cannot. The connection is generally worse in
crowded areas, or areas with many access points."

With the additional information that it's usually worse in crowded areas
or when there are many access points (many access points is generally
indicative that the area may be crowded to a point that multiple APs are
required to support all the clients), it's further evidence that this is
just contention on the AP side.

There are however known problems with N on this kind of card, so I guess
it's technically possible you'd be seeing a different side-effect of the
performance issues with N -- but you also mentioned this was different
from the other performance-related bug reports.

Finally, this being the only network where you reportedly encounter this
particular issue, there is again then no evidence to suggest it's not
environment-related.

I'm willing to consider this might be a bug in NM, but those would
normally affect all wireless networks indiscriminately considering NM
only asks the kernel via wpasupplicant to establish connections and does
minimal house-keeping for the connection. Everything else is done by the
kernel.

I'll reset this to Incomplete. Please see if you can provide further
information that would point this clearly in the direction of a software
bug.

** Changed in: network-manager (Ubuntu)
       Status: Invalid => Incomplete

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https://bugs.launchpad.net/bugs/924082

Title:
  Intel Centrino 6300 Cannot connect direct probe timed out

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