Encryption key turns to off after some time of use with wpa_supplicant

thomas.eriksson at hushmail.com thomas.eriksson
Thu Jan 22 00:09:48 PST 2009

A possible workaround without turning the encryption off would be 
very welcome too!

On Thu, 22 Jan 2009 08:39:44 +0100 thomas.eriksson at hushmail.com 
>We are using Ubuntu 7.10 with wpa_supplicant and ndiswrapper 1.53. 
>The wireless network on our HP Compaq nx7300 laptops connects just 
>fine to a Cisco access point, but after some time of use, like 30 
>minutes, encryption key turns to "off" according to iwconfig and 
>the network is lost.
>Our wpa_supplicant.conf looks like this:
>        ssid="network_name"
>        scan_ssid=1
>        key_mgmt=WPA-EAP
>        eap=PEAP
>        phase2="autheap=MSCHAPV2"
>        anonymous_identity="uid at our.dept"
>        identity="our-dept-wavelanxx/ppp"
>        password="xxxxxxxxxx"
>        priority=10
>        ca_cert="/etc/ssl/pcacert.crt"
>When the network is working iwconfig says:
>wlan0     IEEE 802.11g  ESSID:"network_name"
>          Mode:Managed  Frequency:2.412 GHz  Access Point: 
>          Bit Rate=54 Mb/s   Tx-Power:14 dBm
>          RTS thr:2347 B   Fragment thr:2346 B
>          Encryption key:XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX   
>Security mode:restricted
>          Power Management:off
>          Link Quality:50/100  Signal level:-64 dBm  Noise level:-
>96 dBm
>          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
>          Tx excessive retries:0  Invalid misc:0   Missed beacon:0
>When the network is lost the line with "Encryption key:XXXX-XXXX-
>..." turns to "Encryption key:off".
>When the network is working "arp -n" says:
>Address                  HWtype  HWaddress           Flags Mask 
>WW.XX.YY.ZZ              ether   FF:EE:DD:CC:BB:AA   C wlan0
>When the network is lost "arp -n" says:
>Address                  HWtype  HWaddress           Flags Mask 
>WW.XX.YY.ZZ                     (incomplete) wlan0
>Thanks for any input of what might be wrong here!
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