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[Dennis Heinson <dennis@xxxxxxxxxx>]

Note: Here is the output from iwconfig. Notice that the Bit rate is 0!

wlan0     IEEE 802.11abgn  ESSID:"WLAN"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 00:1F:3F:13:D2:EC   
          Bit Rate=0 kb/s   Tx-Power=23 dBm   
          Retry min limit:7   RTS thr:off   Fragment thr=2352 B   
          Power Management:off
          Link Quality=79/100  Signal level:-55 dBm  Noise level=-106 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

-- 
[ath9k] AR5418 frequently fails to connect to WEP/WPA network
https://bugs.launchpad.net/bugs/278190
You received this bug notification because you are a member of Mactel
Support, which is the registrant for Mactel Support.

Status in The Linux Kernel: Unknown
Status in Mactel Support: New
Status in “linux” source package in Ubuntu: Triaged
Status in “network-manager” source package in Ubuntu: Invalid

Bug description:
The wireless network can be seen, and occasionally connects after a cold boot. Most of the time network-manager complains that the WEP/WPA key is not correct, pops up a dialogue repeatedly.

It may or may not obtain a DHCP lease. However, no data gets transmitted.

Scenario 1: (See comment by Dennis Heinson for another scenario)
Beta release updated 4/10/08 on a gen 2 MacBook Pro (atheros wifi) connecting to a BT home hub with WEP 64 bit encryption (configuration as shipped). No previous problems with Kubuntu 7.10 and the same hardware using self-compiled drivers.

Linux xxxxx-01 2.6.27-4-generic #1 SMP Wed Sep 24 01:29:06 UTC 2008 x86_64 GNU/Linux
NetworkManager 0.7.0.
03:00.0 Network controller: Atheros Communications Inc. AR5418 802.11abgn Wireless PCI Express Adapter (rev 01)

dmesg output:
[   67.910954] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   89.204588] wlan0: authenticate with AP 00:1f:9f:3d:0f:c5
[   89.405056] wlan0: authenticate with AP 00:1f:9f:3d:0f:c5
[   89.605035] wlan0: authenticate with AP 00:1f:9f:3d:0f:c5
[   89.805054] wlan0: authentication with AP 00:1f:9f:3d:0f:c5 timed out
[  100.984690] wlan0: authenticate with AP 00:1f:9f:3d:0f:c5
[  100.984764] wlan0: authenticate with AP 00:1f:9f:3d:0f:c5
[  100.987561] wlan0: authenticated
[  100.987572] wlan0: associate with AP 00:1f:9f:3d:0f:c5
[  100.990918] wlan0: RX AssocResp from 00:1f:9f:3d:0f:c5 (capab=0x411 status=0 aid=1)
[  100.990927] wlan0: associated
[  100.998059] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[  111.684110] wlan0: no IPv6 routers present
[  152.817637] wlan0: disassociating by local choice (reason=3)
[  154.415879] wlan0: authenticate with AP 00:1f:9f:3d:0f:c5
[  154.415976] wlan0: authenticate with AP 00:1f:9f:3d:0f:c5
[  154.418307] wlan0: authenticated
[  154.418316] wlan0: associate with AP 00:1f:9f:3d:0f:c5
[  154.427591] wlan0: RX AssocResp from 00:1f:9f:3d:0f:c5 (capab=0x411 status=0 aid=1)
[  154.427603] wlan0: associated
[  499.651325] wlan0: disassociating by local choice (reason=3)