Hi, I believe I have the same issue, however there's differences that
you installed Ubuntu 16.10 using chroot, while I installed Ubuntu 16.10
using netboot(and then tasksel ubuntu-desktop), here are the
investigation results:
## Possible Cause ##
The problem seems to be lies on the new override config introduced in 16.10:
```
* debian/10-globally-managed-devices.conf: ship a default config to
explicitly unmanage anything that is not wifi or wwan: we definitely want
NM to manage wifi and mobile data; and probably don't want it to touch
wired in many cases.
```
which is installed at /usr/lib/NetworkManager/conf.d/10-globally-
managed-devices.conf , with the following content:
```
[keyfile]
unmanaged-devices=*,except:type:wifi,except:type:wwan
```
that unmanages all network interfaces except wifi and wwan, thus
bluetooth interface in your case and ethernet case in my case are all
unmanaged by default.
According to the future changelog by Martin Pitt:
```
* network-manager.postinst: Don't create
/etc/NetworkManager/conf.d/10-globally-managed-devices.conf override on
new installations. We don't want NM to manage non-wifi/wwan on
servers/cloud instances, and for desktops live-build now installs a
netplan policy snippet to let NM handle all devices.
```
This is designed to not let NM manage those interfaces except in a
desktop edition(possibly because servers normally uses the ifupdown
mechanism to manage networking), what I'm confused is:
* Why there's the need to do so when ifupdown NM plugin already provides the
ability to unmanages the network interfaces that have settings in
/etc/network/interfaces?
* Why the config still working after user installs *ubuntu-desktop, rendering
those network-interfaces unmanaged even when it is clearly not for server/cloud
usage?
## Workaround ##
Remove /etc/NetworkManager/conf.d/10-globally-managed-devices.conf, it works(TM)
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https://bugs.launchpad.net/bugs/1638842
Title:
network-manager does not manage ethernet and bluetooth interfaces when
Ubuntu 16.10 is installed using chroot/netboot method
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