I confirmed this bug, and I said that disabling networkmanager was te solution, but i was FAULT. Hopefully for those that have this problem, the solution is to download the new intel iwlwifi drivers. Just follow this instructions
http://intellinuxwireless.org/?p=iwlwifi&n=howto-iwlwifi In the page says that you do not need to remove the ipw3945 drivers, but i did it cause that driver was still assigned to my card, an not the new ones. My machine has: Intel Pro Wireless 3945ABG After follow the instructions, i am using: iwlwifi-3945-ucode-2.14.4 iwlwifi-1.2.0 Hope in a kernel update packagers include the new drivers, cause that was a big problem. ** Changed in: network-manager (Ubuntu) Assignee: (unassigned) => josevillavi85 (josevillavi85) -- network manager disconnects and cannot reconnect after update https://bugs.launchpad.net/bugs/138442 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs