Comment 137 for bug 969343

@felixhaller: I share your frustration. I have what seems to be yet a different version of the bug, where in 12.04 I remain unable to connect to WPA2 Enterprise networks.

The fix for me was upgrading to 12.10. Now I can connect reliably and maintain the connection. I realize this may not be feasible for you. However, you may want to try a live CD and see if you can connect with 12.10. If 12.10 works for you and 12.04 does not, that should narrow down the possible causes of the problem.