This bug is insane. I tried to make some sense of all the comments, and
there are *at least* three unrelated problems ...

Problem #1: "my skype connection is randomly interrupted and using wicd fixes 
it"
This is likely caused by background scanning not going as smoothly as you think 
-- I believe most versions of NetworkManager still scan every 2 minutes, but 
there were improvements in this area.

Problem #2: "my router crashes when I use Intel's card" (see comment #24, 
comment #34)
This is a bug we've investigated and we think we fixed it in commit 59f53ce22e, 
upgrading the kernel to 3.0.0-13.21 (ubuntu version) or 3.0.6 (stable version) 
should fix it. I'd love to see this tested again, but it seems unlikely that 
there are two bugs that both cause some APs to crash (I'd HOPE not, but some 
APs are notoriously shoddy quality...)

Problem #3: "my 11n connection is really slow, disabling 11n helps"
This is puzzling, and since I've never seen this anywhere I'm starting to think 
it might be a combination of the router/AP & environment used. Anyone near 
Portland, OR or Bielefeld (Germany) where we could debug in person? :-)

Problem #4: "my connections are dropped frequently"
This might or might not be related to #3, but I can't really tell.


Generally, it would be nice if the commenters would include more details about 
their setup, like the exact kernel version (ubuntu package version number), 
and, if possible at all, the model of the AP. Thx!

I'll continue monitoring this bug report for a while but with the volume
of reports I'll have to devise a debug strategy first ...

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https://bugs.launchpad.net/bugs/836250

Title:
  [Oneiric] [Regression] Intel Corporation Centrino Ultimate-N 6300 poor
  networking, packet loss and very slow Lenovo X201 and T500 laptops

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