Connecting to unplugged ethernet network after suspend

[Vaclav Petras]

1. Plug in an Ethernet cable to get Internet connection. (Wireless connections also present.)
2. Suspend the laptop.
3. Unplug the Ethernet cable. (And move to different location with Wi-Fi only.)
4. Wake up from suspend.
5. Wait few moments to connect to a known Wi-Fi network.
6. Try using the Internet.

The Internet doesn't work, pages load indefinitely. The tray icon shows the wireless sign in the "connecting" state (animation). The tray menu shows one Ethernet connection. When I disconnect that one the Internet connection starts working immediately.

The was not happening with 15.10 but happens to me regularly after upgrade to 16.04. I have Docker daemon running.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.2.2-0ubuntu0.16.04.3
ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
Uname: Linux 4.4.0-59-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Jan 31 09:46:54 2017
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IpRoute:
 default via 10.139.120.1 dev wlp2s0 proto static metric 600
 10.139.120.0/21 dev wlp2s0 proto kernel scope link src 10.139.125.237 metric 600
 152.1.14.69 via 10.139.120.1 dev wlp2s0 proto dhcp metric 600
 169.254.0.0/16 dev docker0 scope link metric 1000 linkdown
 172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
SourcePackage: network-manager
UpgradeStatus: Upgraded to xenial on 2016-12-23 (38 days ago)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 docker0 bridge connected /org/freedesktop/NetworkManager/Devices/2 docker0 d4fab1b4-08e4-45f6-a74b-0e4e4aa8898f /org/freedesktop/NetworkManager/ActiveConnection/1
 wlp2s0 wifi connected /org/freedesktop/NetworkManager/Devices/3 ncsu 187812f8-932b-4c5a-9bf8-ec5ee97a95e9 /org/freedesktop/NetworkManager/ActiveConnection/2
 enp1s0f1 ethernet disconnected /org/freedesktop/NetworkManager/Devices/0 -- -- --
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/1 -- -- --
nmcli-nm:
 RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN
 running 1.2.2 connected started full enabled enabled enabled enabled enabled

[Vaclav Petras (wenzeslaus)]

Forgot to include similar bug reports #59981 and #165004.