This bug is likely related to bug 40125. That is, the drivers are unloaded and then reloaded. NetworkManager is probably trying the wireless driver before the wired driver.
** Summary changed: - Asks for gnome-keyring on resume from suspend + Tries wireless network from resume, even if connected via wired -- Tries wireless network from resume, even if connected via wired https://launchpad.net/bugs/45745 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs