At a high level, I have the same problem: Network Mnager does not work anymore after resume, about half the time.
My work around is to run in a terminal: sudo restart network-manager
As a side effect, nm-applet sometimes crashes when I do that. But it works.
At a lower level, I am not sure if my problem is the same as the original poster; I am not familiar with Network Manager so I have not yet bothered to dig deep into the logs to figure out what is going one. I could post the logs if requested.
At a high level, I have the same problem: Network Mnager does not work anymore after resume, about half the time.
My work around is to run in a terminal: sudo restart network-manager
As a side effect, nm-applet sometimes crashes when I do that. But it works.
At a lower level, I am not sure if my problem is the same as the original poster; I am not familiar with Network Manager so I have not yet bothered to dig deep into the logs to figure out what is going one. I could post the logs if requested.