I came across the problem of using the A90 in WPA2 with password (AES) and  the Ubuntu 8.04 LTS.   One of my clients had problem.   I reinstalled the version and update but the error remained. The system worked with no password. The A90 has a the bios is v.04

There are many fixes including updating the drivers or change the program. I did not want to run an ndiswrapper.

I migrated to version 8.10 and of course use the dell version.  I had problem installing this until i went and installed 9.10.

A good site to read on things is the link below.

http://www.ubuntumini.com/2009/03/ubuntu-904-jaunty-jackalope-beta-on.html

all versions are available here http://linux.dell.com/files/ubuntu/.

There are two drives  dell wmi hotkey driver and broadcom STA driver.   I love econ so I used a search on the Hayek vs Keynes you tube video and the with the dell the system was lagging. http://www.youtube.com/watch?v=d0nERTFo-Sk.  I did test on another system and had the better results with the broadcom.

I had some errors.  one was the key ring problem with the public key for the launchpad.net/dell-team  site. After a few search. this is what you do.  goto launchpad.net and search for dell-team

in there you will find the key. copy this to a file on your pc and then launch the software sources authentications and add import it in.

the key http://keyserver.ubuntu.com:11371/pks/lookup?op=get&search=0×8B9FBE5158B3AFA9

the link — https://launchpad.net/~dell-team/+archive/ppa

Audio problems was fixed by editing the  /etc/modprobe.d/alsa-base file and adding this to the last line

options snd-hda-intel model-dell to the