on Ubuntu 20.04 NetworkManager won't manage multiple dongles at once.
I can connect to the internet with dongle A, and then disconnect it and connect with dongle B, but when both are plugged just one or none connects successfully.
Is that a know issue?
EDIT1: I can now connect both the dongles mannually after:
- in nm-connection-editor disabling "automatic connection"
- enabling (in the above editor, ipv4, route pannel) "ignore auto obtained routes", "use this connection only for resources on it's network"
Since I have different card with different APN's I suppose NM doesn't know wich config to use ( /etc/NetwokManager/system-connections/ )
I tried editing the config files in the above directory and adding the filter device-id=*** ... didn't work
Searching the internet I found out that there's also a sim-id filter that can be used in the config files of NetworkManager, which identifies the sim card uniquely. It may solve the problem but I don't know how to obtain that value and if it's supported anymore.
Anyway if my theory is correct I'll just get two identical sim cards and even if NM sends an APN config that was supposed to other device it should work anyway. I'll inform you if it does.
EDIT 2: Now I have identical sim cards, still NM messes up... What can I do?
