This also affected my machines. Thanks to the forum reference I was able
to piece together this:
The file belonging to network-manager /usr/lib/NetworkManager/conf.d/10
-globally-managed-devices.conf contains:
[keyfile]
unmanaged-devices=*,except:type:wifi,except:type:wwan
Curiously, at least on my machines, this also knocked out "gsm" type
connection which made me offline as I rely on 3G connections often.
The "solution" is to create an empty file at
/etc/NetworkManager/conf.d/10-globally-managed-devices.conf the presence
of which overrides the distribution packaged default.
I consider this a critical error as it can result in inability to
connect typical system to the network to pull in updates that would
resolve the problem.
** Changed in: network-manager (Ubuntu)
Status: New => Confirmed
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Touch seeded packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1716034
Title:
Network manager stops managing Ethernet links after upgrade
Status in network-manager package in Ubuntu:
Confirmed
Bug description:
After upgrading Ubuntu, it stopped configuring the word connection on
my headless computer (super annoying to deal with). In any case, it
was an issue with NM config change that caused my wired device to
become unmanaged.
There are several people discussing this here:
https://askubuntu.com/questions/882806/ethernet-device-not-managed
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1716034/+subscriptions
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