NM keeps asking for WPA-PSK password.

[Antoni Mont <antoni mont gmail com>]

New on that list, sorry if that question was already discussed.

Problem arises at setting up a netbook Samsung NF310 (network controller 
BCM 4313 802.11b/g/n) with Ubuntu 11.04 (Natty).

NM detects my access point (and many others of the neighbourhood) but 
ask time and again for password, without establishing connection.

Have tried with Wicd, with similar results: "bad passowrd" (so, 
probably, not directly related with NM)

Also tried substituting STA driver by b43-fwcutter + firmware: no way.

At command line I get:

montserrat@sm1:~$ iwconfig wlan0
wlan0     IEEE 802.11bgn  ESSID:"FTE-5C8A"
          Mode:Managed  Frequency:2.412 GHz  Access Point: 
94:FE:F4:F9:63:18
          Bit Rate=1 Mb/s   Tx-Power=19 dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=70/70  Signal level=-17 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

As for the file /var/log/syslog, I copy some lines that seems to me 
significant:

May  6 14:03:43 sm1 NetworkManager[463]: <info> (wlan0): supplicant 
connection state:  disconnected -> scanning
May  6 14:03:44 sm1 wpa_supplicant[530]: Trying to associate with 
94:fe:f4:f9:63:18 (SSID='FTE-5C8A' freq=2412 MHz)
May  6 14:03:44 sm1 kernel: [ 1579.722485] wlan0: authenticate with 
94:fe:f4:f9:63:18 (try 1)
May  6 14:03:44 sm1 kernel: [ 1579.724784] wlan0: authenticated
May  6 14:03:44 sm1 kernel: [ 1579.724907] wlan0: associate with 
94:fe:f4:f9:63:18 (try 1)
May  6 14:03:44 sm1 NetworkManager[463]: <info> (wlan0): supplicant 
connection state:  scanning -> associating
May  6 14:03:44 sm1 kernel: [ 1579.729567] wlan0: RX AssocResp from 
94:fe:f4:f9:63:18 (capab=0x411 status=0 aid=3)
May  6 14:03:44 sm1 kernel: [ 1579.729579] wlan0: associated
May  6 14:03:44 sm1 kernel: [ 1579.731487] Associated:	True
May  6 14:03:44 sm1 wpa_supplicant[530]: Associated with 94:fe:f4:f9:63:18
May  6 14:03:44 sm1 NetworkManager[463]: <info> (wlan0): supplicant 
connection state:  associating -> associated
May  6 14:03:44 sm1 NetworkManager[463]: <info> (wlan0): supplicant 
connection state:  associated -> 4-way handshake
May  6 14:03:52 sm1 kernel: [ 1587.793433] wlan0: deauthenticated from 
94:fe:f4:f9:63:18 (Reason: 15)
May  6 14:03:52 sm1 kernel: [ 1587.794312] Associated:	False
May  6 14:03:52 sm1 wpa_supplicant[530]: WPA: 4-Way Handshake failed - 
pre-shared key may be incorrect
May  6 14:03:52 sm1 wpa_supplicant[530]: CTRL-EVENT-DISCONNECTED 
bssid=94:fe:f4:f9:63:18 reason=0
May  6 14:03:52 sm1 kernel: [ 1587.798570] cfg80211: All devices are 
disconnected, going to restore regulatory settings
May  6 14:03:52 sm1 kernel: [ 1587.798591] cfg80211: Restoring 
regulatory settings
May  6 14:03:52 sm1 kernel: [ 1587.798608] cfg80211: Calling CRDA to 
update world regulatory domain
May  6 14:03:52 sm1 NetworkManager[463]: <info> (wlan0): supplicant 
connection state:  4-way handshake -> disconnected

Thanks in advance for any help
Toni