Bug#637240: Final info...
I don't know what's going on here but this has started working as soon
as I brought the netbook next to the AP:
lo no wireless extensions.
eth0 no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:"WLAN_B5"
Mode:Managed Frequency:2.437 GHz Access Point: 00:23:F8:9D:AD:11
Bit Rate=54 Mb/s Tx-Power=19 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Link Quality=70/70 Signal level=-35 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:26 Missed beacon:0
Aug 13 19:00:04 stt300 kernel: [ 1347.536793] wlan0: associated
Aug 13 19:00:04 stt300 wpa_supplicant: Associated with 00:23:f8:9d:ad:11
Aug 13 19:00:04 stt300 kernel: [ 1347.545284] ieee80211 phy0:
brcmsmac: wl_ops_bss_info_changed: associated
Aug 13 19:00:04 stt300 NetworkManager: <info> (wlan0):
supplicant connection state: associating -> associated
Aug 13 19:00:05 stt300 NetworkManager: <info> (wlan0):
supplicant connection state: associated -> 4-way handshake
I think this bug can be closed, I know the brcmsmac is a stage driver
and so we can experience some problems with it. Anyway, I will keep an
eye on it.