Comment 20 for bug 259157

On Wed, Oct 08, 2008 at 09:07:55PM -0000, Wilbur Harvey wrote:
> I have all the updates as of 1 hour ago.
>
> My wired Gigabit Ethernet is not showing up in the network manager and Firefox starts up in offline mode.
> My ethernet is:
> Oct 8 09:44:08 hnlwnh kernel: [ 6.425408] sky2 0000:03:00.0: v1.22 addr 0xfdafc000 irq 17 Yukon-2 EC Ultra rev 5
>
> The network, however, is working.
>

This means that your device is unmanaged. This happens when you have
it configured in /etc/network/interfaces and use NM in unmanaged mode.

I would suggest that you change to managed=true in
/etc/Network/nm-system-settings.conf.

If that doesnt help, try to remove your configurations from
/etc/network/interfaces and let NetworkManager manage your connection
in the good old way.

 - Alexander