Same problem here too. After clear installation only DHCP work.
I set-up static IP by network-manager and close, reopen network-manager and "roaming mode" are enable. I setup by "ifconfig" and my board only ping my router, no web, no ftp, no mail...etc... I edit /etc/network/interfaces adding "static" and rebooted... now static IP work for me... boh... GNU/Linux Ubuntu Feisty Herd4 -- [Feisty] network-admin forgets static in interfaces https://launchpad.net/bugs/80622 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs