[Pkg-utopia-maintainers] Bug#755202:

[Frederik Himpe]

I discussed this problem on the upstream mailing list here:
http://thread.gmane.org/gmane.linux.network.networkmanager.devel/25377

In my case, the problem was indeed that netconsole was loaded.
Netconsole was loaded in the initrd, and brought the network interface
up. As the network interface went up, the kernel would automatically
configure an IPv6 address via SLAAC.

Then when later network-manager starts up, it notices that the network
interface is already brought up, and hence it decides not to touch it
any more: instead of loading the default network configuration for that
device, a (temporary) network connection with the name of the device and
the configuration corresponding to the actual state (in my case: IPv6
activated but no IPv4) is created in NM.

I removed the netconsole stuff, removed the eth0 network connection in
NM, and rebooted the system, and everything was OK again.

Apparently it's only safe to load netconsole after NM has started,
otherwise you get hit by this problem.

-- 
Frederik Himpe <frederik at frehi.be>