Comment 12 for bug 420678

I found a webpage on which s.o. described how he fixed this for his Intel 5100 chipset. Since this is the same driver as for the 5300 chipset in my hw8530w i tried and my wlan works again now. Shame on Ubuntu for releasing such a buggy distribution like 9.10.

Here is what worked for me:

go to http://linuxwireless.org/download/compat-wireless-2.6/
download the newest drivers (I downloaded compat-wireless-2009-11-05.tar.bz2)
unpack them
sudo make && sudo make install && sudo shutdown -r now

HTH.