*** This bug is a duplicate of bug 408773 ***
https://bugs.launchpad.net/bugs/408773
Same thing happens to me, it is apparmor and dhclient related.
If I disable Network Manager and try to get the settings through
dhclient I get:
#dhclient eth0
Internet Systems Consortium DHCP Client V3.1.2
Copyright 2004-2008 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/
Open a socket for LPF: Operation not permitted
Settings complaining mode for dhclient fixes the situation and I can
connect to wired/wireless:
#aa-complain --complain /sbin/dhclient
#/etc/init.d/NetworkManager restart
Hope this helps.
--
Apparmor breaks wireless networking
https://bugs.launchpad.net/bugs/408829
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