*** This bug is a duplicate of bug 92299 ***
https://bugs.launchpad.net/bugs/92299
This is confirmed, however there has been some obscurity with regard to
what the actual problem is.
Quite simply, when an interface is placed under Network Manager's
control by checking "Enable roaming mode" for that interface under
"Admin > Networks", Network Manager will attempt to connect the
interface with DHCP ("dynamic IP"), and if there is no response it calls
itself connected by filling in the connection information with null IPs
(0.0.0.0) (it isn't really connected). There is no opportunity to tell
Network Manager that the network instead requires a static IP.
The only way to configure an interface with a static IP is the old
fashioned way, without Network Manager (by unchecking "roaming mode" in
"Admin > Networks" and filling in the required configuration). This
allows the interface to connect, and Network Manager knows it is
connected and hence displays the "connected" notification icon, however
because the interface is not under Network Manager's control it does not
show the blinking screens for network activity.
For those switching between static and dynamic IP (DHCP) networks, you
should save a "location" in "Admin > Networks" for each static IP
network with the interfaces properly configured for, and another with
the interfaces configured for "roaming mode" for when you are in a
dynamic IP network.
All in all this could be considered a bug or perhaps Network Manager was
never supposed to handle static IP networks (hence leaving it to the
"Admin > Networks" dialog). Either way it does not prevent users from
connecting to their networks and hence not a critical problem.
And if there is any error in my clarification PLEASE point it out!
--
[Feisty] Network manager doesn't allow static IP configuration
https://bugs.launchpad.net/bugs/95023
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