Indeed this still happens with NM in Precise. Usually, just restarting NM is enough, though, no need to reboot the whole machine.
I'm not sure if it's NM's fault or wpa_supplicant's fault. Every time I've experienced this it has been related to networks protected with wpa. ** Changed in: network-manager (Ubuntu) Status: Expired => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/943277 Title: NM cannot change wireless networks To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/943277/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs