Thanks for reporting this bug. I think it is a duplicate of bug 284298 .
To save a static connection using network manager, you must first delete
the existing connection.
** Changed in: network-manager (Ubuntu)
Sourcepackagename: None => network-manager
Status: New => Incomplete
--
Network Manager refuses static wired connection
https://bugs.launchpad.net/bugs/316314
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs