Comment 37 for bug 37120

I see a similar problem on Ubuntu 7.04, kernel 2.6.20-15-generic. The Asus 107g PCMCIA card is detected and is trying to connect but gets no connection. I have tried both no encryption, WEP 64bit encryption, WEP 128bit encryption and WPA-PSK encryption but with no luck. Also i noted that network-manager only showed WEP 64 and WEP 128 encryption and not WPA or no encryption even though the router was configured to no password or WPA-PSK.

Then I uninstalled network-manager and network-manager-gnome, and inserted the following to /etc/network/interfaces:

iface ra0 inet dhcp
        pre-up ifconfig ra0 up
        pre-up ifconfig ra0 down
        pre-up ifconfig ra0 up
        pre-up ifconfig ra0 down
        pre-up iwconfig ra0 essid "MyRouterName"
        pre-up iwconfig ra0 mode Managed
        pre-up iwpriv ra0 set AuthMode=WPAPSK
        pre-up iwpriv ra0 set EncrypType=TKIP
        pre-up iwpriv ra0 set WPAPSK="MySecretPassword
        pre-up ifconfig ra0 up
auto ra0

and rebooted. The network has worked with no problems for a couple of weeks now. The router is an Asus 500g deluxe and configured to use WPA-PSK.

I would think there is a defect in the network-manager application.

See https://help.ubuntu.com/community/WifiDocs/Driver/RalinkRT2500