@davidyu
 Thanks, it seems you are using the same type of adapter for your T60, as I am 
having bad experience with on more ThinkPads from the R-series, and that too 
have been reported not working above. What is different is that you are 
probably using a Certificate (LEAP) and WPA or WPA2 Enterprice right ? - where 
my bad experiences with this adapter type (and the ath5k module) is based 
primarily on WPA and WPA2 Personal or Webbased auth. on an Enterprise Cisco 
network and partly WPA/WPA2 Personal on different types of other SMB/home 
routers. From this I wonder if the bug could be related to an issue with the 
supplicant instead, and I try to see if I'm able get expected performance with 
a WPA/WPA2 Enterprice setup.
Are you able to get normal max speed (for 54G) around 18 to 22 Mbps (download) 
on your setup, or just as I experience less than 1 to 2 Mbps ?

-- 
[Karmic] Atheros AR5211 - ath5k driver connection and performance issues
https://bugs.launchpad.net/bugs/461419
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