I'm running 10.04.1 lts on a samsung netbook. With the last couple of updates, it seems that network-manager isn't cooperating.
I made the suggestions here - http://www.ubuntugeek.com/how-to-fix-network-manager-disabled-problem-in-ubuntu-10-04-lucid.html
but this didn't have any affect, other than to show the network-manager icon on the top status bar. However, it indicates that the wired network device is not connected.
The workaround for the moment (at least for me) seems to be -
1. stop the network-manager
2. edit the /etc/network/interfaces file with whatever you'd like eth0 to be (dhcp or static) - below is my version
***** auto eth0
iface eth0 inet static
3. restart the network with /etc/init.d/networking restart
The icon in the status bar may still be present, but it isn't controlling the net interface any longer, and the network connection now works.
Lots of confusion on the web about this, so i thought i'd throw this old-style resolution out there.
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