Ubuntu keeps trying to connect to a WiFi network while plugged into an ethernet

[braykov]

My network cable is plugged in but NM shows it is trying to connect to WiFi.
This happened on Ubuntu 15.04 and continues after upgrade to 15.10.
I have a RTL8723be card and it is hardly working correctly, but that is a whole other issue.

1) Ubuntu 15.10, 64bit

2) network-manager:
  Installed: 1.0.4-0ubuntu5.1
  Candidate: 1.0.4-0ubuntu5.1
  Version table:
 *** 1.0.4-0ubuntu5.1 0
        500 http://mirrors.neterra.net/ubuntu/ wily-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1.0.4-0ubuntu5 0
        500 http://mirrors.neterra.net/ubuntu/ wily/main amd64 Packages

3, 4) Expected is that when network cable is plugged in and obviously I have a stable, well running connection, NM should not try to also connect via WiFi. Also expected that when I pull out the cable, the WiFi would connect. Instead the wifi shows connected but there is no internet activity.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: network-manager 1.0.4-0ubuntu5.1
Uname: Linux 4.3.0-040300-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Nov 17 15:58:42 2015
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2014-12-07 (344 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
IpRoute:
 default via 192.168.0.1 dev eth0 proto static metric 100
 default via 192.168.0.1 dev wlan0 proto static metric 600
 169.254.0.0/16 dev eth0 scope link metric 1000
 192.168.0.0/24 dev eth0 proto kernel scope link src 192.168.0.101 metric 100
 192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.104 metric 600
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
SourcePackage: network-manager
UpgradeStatus: Upgraded to wily on 2015-10-23 (24 days ago)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 eth0 ethernet connected /org/freedesktop/NetworkManager/Devices/2 Wired connection 1 e0a0e162-076e-43d9-8699-472157a8989d /org/freedesktop/NetworkManager/ActiveConnection/6
 wlan0 wifi connected /org/freedesktop/NetworkManager/Devices/1 Tundra 1 c035b039-27ae-46de-b025-57437bf6b07f /org/freedesktop/NetworkManager/ActiveConnection/7
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/0 -- -- --
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'.

[Launchpad Janitor (janitor)]

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