wireless network disppeared?

[WarTalker <wartalker gmail com>]

i do not know why?
the wireless network disppeared today. and i check the log:

Oct 20 13:37:27 LiuWei NetworkManager: <info>  Updating allowed
wireless network lists.
Oct 20 13:37:27 LiuWei NetworkManager: <WARN>
nm_dbus_get_networks_cb(): error received:
org.freedesktop.NetworkManagerInfo.NoNetworks - There are no wireless
networks stored..
Oct 20 13:37:27 LiuWei NetworkManager: <info>  User request to disable
wireless.
Oct 20 13:37:27 LiuWei NetworkManager: <info>  Deactivating device wlan0.

help?





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