Comment 79 for bug 348275

The issue seems to be with KDE Network Manager. Here is what I found out by running Ubunutu 9.04 and Kubuntu 9.04 live CDs:

- connection to non-secured wireless AP works in both
- connection to WPA secured AP works out of the box only from Ubuntu, but not from Kubuntu
- connection to WPA secured AP is possible to setup from Kubuntu through 'interfaces' and 'wpa_supplicant.conf' files as outlines in https://help.ubuntu.com/community/WifiDocs/WPAHowTo
- all of the above was done on the same wireless client (Lenovo R51 notebook) and AP (WRT54G with Tomtato firmware)

Some details:
--------------------
Ubuntu 9.04 Live off the CD
- Connects to WPA2 secured network out of the box
-- asks for WPA2 keyphrase
-- then asks for KeyRing (or smth like that) password, the step that is missing in KDE4 NetManager

Kubuntu 9.04 Live off the CD
- Does NOT connects to WPA2 secured network out of the box
- the workaround through wpa_supplicant.conf file does work

Some conclusions: since the 'low level' wireless setup (through wpa_supplicant) does work even in Kubuntu, it really seems to be the issue with the KDE Network Manager rather than chipset drivers....

Just my 2c..