Comment 8 for bug 89295

I have the same problem in Feisty. network-manager is updated.

dmesg |grep 'eth.*link' has empty output, even after manual reconnecting.

in /etc/network/interfaces the line "auto eth0" dissapeared, as desribed here:

http://ubuntuforums.org/showthread.php?t=408647&highlight=network+manager