According to the first log entries in WifiSyslog.txt, the connection would have stopped because no wifi beacons were received for a while. This could be either an issue with the wireless card or with the access point... It's unfortunately very hard to figure out.
Jun 5 18:11:33 localhost NetworkManager[910]: <info> (wlan0): supplicant connection state: completed -> disconnected Jun 5 18:11:33 localhost kernel: [ 2005.540083] ieee80211 phy0: wlan0: No probe response from AP 00:18:e7:d2:bf:6e after 500ms, disconnecting. Jun 5 18:11:33 localhost kernel: [ 2005.541611] cfg80211: All devices are disconnected, going to restore regulatory settings What could be tried would be to install the broadcom driver packages from oneiric on natty, but I'm not sure whether that's really supposed to be doable, or how well that might work. ** Changed in: network-manager (Ubuntu) Status: New => Incomplete ** Changed in: network-manager (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/793328 Title: network-manager drops wifi connection and fails to reconnect To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/793328/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs