Amilo Pa3553 / ath9k ===========================
This notebook needs new BIOS V1.16. With previos bios RFI is off, and you can't activate it with keyboard from linux.
Procedure for BIOS update
Download location is http://support.fujitsu-siemens.com/com/support/linkapplication.html?LNG=EN&ProductID=25493
You get download BIOS update when you uncheck option "only supported operating systems".
After that, I suggest to get FreeDOS ISO image (cca 26 MB) and burn it to the CD.
Boot Flash update CD, start FLASH.EXE and wait ...
After sucessfull BIOS upgrade,
> Shame on me. I didn't uncheck only "supported operating systems". Now I have option to download new bios.
When you have BIOS 1.16
Under Advanced/Wireles Device/Wireless Radio -> Enabled
On reboot, you will see wifi led activated (right corner, on the front of notebook)
Linux kernel
It works out of box with 2.6.28 kernel (ubuntu jaunty alpha 3), and 2.6.29-rc2