I have the same issue.
The problem is the module acx, it cannot be loaded:
$ sudo modprobe acx FATAL: Error inserting acx (/lib/modules/2.6.22-8-generic/ubuntu/wireless/acx/acx.ko): Invalid argument
Running 2.6.20 kernel in Gutsy (from Feisty, I didn't uninstall it) on the same system, acx is loaded and the card works without problems.
I have the same issue.
The problem is the module acx, it cannot be loaded:
$ sudo modprobe acx 2.6.22- 8-generic/ ubuntu/ wireless/ acx/acx. ko): Invalid argument
FATAL: Error inserting acx (/lib/modules/
Running 2.6.20 kernel in Gutsy (from Feisty, I didn't uninstall it) on the same system, acx is loaded and the card works without problems.