Upgrade to Yakkety removes eth0 from /etc/network/interfaces

[Oliver Klee]

I've just upgraded this machine from Kubuntu 16.04 to Kubuntu 16.10 using the uprading UI. Before the upgrade, I had lo and eth0 in /etc/network/interfaces. After the upgrade, there was only lo, no eth0 anymore, leaving me without a network connection. I had to re-enter eth0 into the file and restart the networking service to get networking functionality again.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: network-manager 1.2.6-0ubuntu1
ProcVersionSignature: Ubuntu 4.8.0-41.44-generic 4.8.17
Uname: Linux 4.8.0-41-generic x86_64
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
CurrentDesktop: KDE
Date: Fri Mar 10 17:24:57 2017
IfupdownConfig:
 auto lo
 iface lo inet loopback

 auto eth0
 iface eth0 inet dhcp
InstallationDate: Installed on 2012-01-28 (1868 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
IpRoute:
 default via 192.168.100.254 dev eth0
 169.254.0.0/16 dev eth0 scope link metric 1000
 192.168.100.0/24 dev eth0 proto kernel scope link src 192.168.100.3
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
RfKill:

SourcePackage: network-manager
UpgradeStatus: Upgraded to yakkety on 2017-03-09 (1 days ago)
nmcli-con: NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT AUTOCONNECT-PRIORITY READONLY DBUS-PATH ACTIVE DEVICE STATE ACTIVE-PATH
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 eth0 ethernet unmanaged /org/freedesktop/NetworkManager/Devices/1 -- -- --
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/0 -- -- --
nmcli-nm:
 RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN
 running 1.2.6 connected started none enabled enabled enabled enabled enabled

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[spike speigel (frail-knight)]

Possible dup of 1676547 ??