Yes, this is because NM refuses to manage devices that are described at /etc/network/interfaces.
I don't see an easy way to fix without breaking at least one use case, need to check if forcing NM to manage all interfaces would cause any issue at the image.
Yes, this is because NM refuses to manage devices that are described at /etc/network/ interfaces.
I don't see an easy way to fix without breaking at least one use case, need to check if forcing NM to manage all interfaces would cause any issue at the image.