*** This bug is a duplicate of bug 1676547 ***
https://bugs.launchpad.net/bugs/1676547
"After pulling my hair for several days, I found this:
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1638842
/usr/lib/NetworkManager/conf.d/10-globally-managed-devices.conf has the
following content:
[keyfile]
unmanaged-devices=*,except:type:wifi,except:type:wwan
Removing the file and restarting NetworkManager did the trick."
This worked for me. Thank you so much.
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https://bugs.launchpad.net/bugs/1658921
Title:
NetworkManager does not manage wired connection
Status in network-manager package in Ubuntu:
Confirmed
Bug description:
NetworkManager does not manage my wired eth0 connection, no matter how
I set /etc/network/interfaces or
/etc/NetworkManager/NetworkManager.conf
Using ubuntu 16.04, /etc/network/interfaces only managed lo, and
[ifupdown] section of NetworkManager.conf had set managed=false.
With these same settings, after upgrading to ubuntu 16.10, eth0
appears as unmanaged in nm-applet.
If I modify /etc/network/interfaces and add
auto eth0
iface eth0 inet dhcp
And set managed=true in NetworkManager.conf [ifupdown] section, eth0
is still unmanaged despite it does get an IP from DHCP server.
This is happening in my five computers (two laptops and three
desktops).
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https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1658921/+subscriptions
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