This problem is not Ubuntu specific, but NetworkManager specific. I have problems with NM too. But yours sound mainly like a configuration problem with the "/etc/networks/interfaces" file.
Bugs for Network Manager here: http://bugzilla.gnome.org/enter_bug.cgi?product=NetworkManager -- Network Manager Applet Has Trouble With Static IP Address https://bugs.launchpad.net/bugs/202605 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs