Are the other connections set to "Available to all users"? It's the only thing I can think of that would not allow you to edit a connection.
Also, most of the fields greyed out or is the apply button the only item unavailable? Is this right after an upgrade of NetworkManager from a previous release?
I think it could be helpful to have screenshots of each of the tabs in a connection that can't be edited (e.g. where Apply is grey), to make sure all the fields are filled in properly.
Are the other connections set to "Available to all users"? It's the only thing I can think of that would not allow you to edit a connection.
Also, most of the fields greyed out or is the apply button the only item unavailable? Is this right after an upgrade of NetworkManager from a previous release?
I think it could be helpful to have screenshots of each of the tabs in a connection that can't be edited (e.g. where Apply is grey), to make sure all the fields are filled in properly.