Comment 5 for bug 95828

Same problem here. rt2500 pci card worked fine under Edgy. Upgraded via alt CD and no network. Numerous attempts at getting network manager to sort it out failed. I uninstalled network manager and it still will not connect via the Gnome network GUI. Note that this is with WEP encryption.

I _am_ able to connect via the command line:

sudo ifconfig ra0 down
sudo iwconfig ra0 essid blahblahblah key hexblahblah
sudo dhclient ra0

I found this at https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/37120

Syntax to manually configure in /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

Since I am only using WEP, modified to:

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 key "MyKeyInHex"
        pre-up iwconfig ra0 mode Managed
        pre-up ifconfig ra0 up
auto ra0

Now I have wireless connectivity which survives a reboot.

See also bugs 107555 and 78037