Comment 3 for bug 119660

This is still an issue in Hardy. Currently, NetworkManager is set to "roaming" by default. NIS works fine, but autofs does not. I have to login as the local admin and restart the service before I can login with my NIS user. My experience with Fedora 8 said that to fix this, you need to disable roaming for the wired connection and set it to DHCP. However, under Hardy, the system locks up and I was forced to power it off to get the system back. Roaming makes sense for systems with more then one ethernet device, but a desktop with a single ethernet device, roaming causes problems if that system is supposed to use a network authetication/home directory setup such as NIS/AUTOFS, etc.

It seems that the NetworkManager is not quite right under Ubuntu 8.04. On Fedora 8, NIS would not work at all out of the box due to the network connection not being established until a user logged in. If you disable roaming and set it to use DHCP everything works as expected. Ubuntu 8.04, NIS works with NetworkManager set to roaming however disabling it causes the networking to not work at all. I get no IP address, ifconfig can't seem to bring up the eth0 device and the system locks up after attempting to bring up the eth0 connection.

I can try and gather more information upon request as I'd love this to be fixed.