Description of problem: iwlwifi driver does not connect with 802.11N throughput even when AP is set to N-only connections.


Version-Release number of selected component (if applicable):
3.2.5-3.fc16.x86_64

How reproducible: Constant/Always

This is an evolution of bug https://bugzilla.redhat.com/show_bug.cgi?id=785561 - the iwlwifi connection does not drop any longer but the performance is almost unusable.

Steps to Reproduce:
1. Start laptop w/ iwlwifi, WPA-PSK connection to 802.11N AP
2. Start laptop w/ ath9k, WPA-PSd conenction to same 802.11N AP 
3. Review connection details or run speed test
  
Actual results:
iwlwifi reports 1MB/s at rest, 45MB/s while transmitting
ath9k reports 150MB/s always

Expected results:
iwlwifi reports 1MB/s at rest, 150MB/s while transmitting
OR
iwlwifi reports 150MB/s always

Additional info:

There is definitely something going on with the iwlwifi driver. I have my HP
laptop (Phenom II 3GHz) using the ath9k driver running the same kernel as my
X53 ASUS (Core i7, 2.9GHz w/ Turbo) using the iwlwifi driver.

Both are connecting to the same AP. iwlwifi connects at 54MB max and drops to
1MBit regularly. Ath9k reports a steady 150MBit connection. The AP is
configured for 802.11N (WPA-PSK).

Speedtest.net shows similar results. the ath9k downloads at around 20-22MB, and
uploads around 1.5MB. The iwlwifi downloads at 5-6MB, and uploads at 1.5MB. The
upload speed is artificially throttled by my cable company. The download speeds
should be identical.

So now what? Any additional information I can provide that can help track down
the problem? The iwlwifi should not be connecting so slow for sure.