Public bug reported:

When I work on my laptop (Toshiba M200) at home on my wireless network
everything is working fine, I put my laptop in standby (by closing the
lid) and still everything is OK: it is going in standby with no
problems.

Then I turn it back on in the train (where I don't have a wireless
connection) and NetworkManager is running with 100% CPU usage. I have to
kill it with the -9 option to be able to stop it. When I am at the
university I can restart wireless with /etc/init.d/dbus restart, but
this introduces problems. My laptop will not go into standby when I
close the lid (it does when I press the standby-button of gdm), and the
networkManager also does not seems to be able to get access to the
keyring (Both known wireless accesspoints as well as VPN connections
keep asking for keys/passwords).

** Affects: ubuntu
     Importance: Undecided
         Status: New

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network manager runs with 100% cpu usage when resume from standby and wireless 
network is not in range
https://bugs.launchpad.net/bugs/164178
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