NetworkManager tries to connect, but usually does not associate [dmesg]:
[14849.660084] wlan0: authenticate with AP 00:1f:3f:13:d2:ec
[14849.860087] wlan0: authentication with AP 00:1f:3f:13:d2:ec timed out
The NetworkManager logs do not reveal anything more than that.
When it does associate, it fetches an IP address but no data gets transmitted.
Scenario 2:
Atheros AR5418 168c:0024 Wifi-N card.
modinfo ath9k 9492E35B
vermagic: 2.6.27-7-generic SMP mod_unload modversions 586
srcversion: 56C428B2A623B57
kernel 2.6.27-7-generic -modules 2.6.27.7.10
linux-backports
NetworkManager tries to connect, but usually does not associate [dmesg]:
[14849.660084] wlan0: authenticate with AP 00:1f:3f:13:d2:ec
[14849.860087] wlan0: authentication with AP 00:1f:3f:13:d2:ec timed out
The NetworkManager logs do not reveal anything more than that.
When it does associate, it fetches an IP address but no data gets transmitted.
Thus, it might even be a mac80211 problem.
Thanks!