Ubuntu 9.04 and Intel Corporation PRO/Wireless 4965 AG or AGN

Since my update to Ubuntu 9.04 I was experiencing lots of wifi connections problems.

Into the logs I was getting messages such as:

• Kill switch must be turned off for wireless networking to work.
• ADDRCONF(NETDEV_UP): wlan0: link is not ready
• ...

It was really boring but a solution to all wifi connections problems with the "Intel Corporation PRO/Wireless 4965 AG or AGN" controller is available by installing the package linux-backports-modules-jaunty (you will have to add the jaunty-backports repository to your software sources). Then reboot and voila.