I use Ubuntu linux distribution which uses nfs as root file system. I have problem when I want to run GDE, because network manager starts during boot and killing nfs connection to the root file system and kills my network connection, too. How I can stop gnome network manager from starting during boot?
I do not use Ubuntu, but I hope that my answer will help you. I think that you have to remove gnome network manager from your session. You could use following command:
update-rc.d -f NetworkManager remove
Maybe there are better way for removing it, but I do not know it.