Comment 37 for bug 63989

Stani, have you tried blacklisting the prism2 *and* the orinoco drivers?

I added these to /etc/modprobe.d/blacklist on my T30 and have wireless working (some nits, but it works, WPA and all):

blacklist orinoco
blacklist orinoco_pci
blacklist hermes
blacklist p80211
blacklist prism2_pci

If you have a prism card, also look into upgrading the firmware:
http://linux.junsun.net/intersil-prism/