network-manager only shows one wifi

[Thomas Mayer]

First of all, my wifi is working great most of the time, at least as long as I don't use other network connections (rj45) and as long as I do not suspend/resume and as long as I don't touch my hardware rfkill-switch.

But, as it turns out, from time to time network manager
- can't see my wifi SSID any more ("********net" in the screen shot is some other random wifi in the neighborhood).
- can't see any SSID in the neighborhood except one

Result: I can't reconnect to my wifi

Suggested Fix: network-manager should not loose the connection in the first place or at least rescan the wifi neighborhood and reconnect to my wifi.

Additional information: The configuration of my wifi is not lost. As soon as a scan is performed, network-manager finds it and connects to it. To initiate such a scan, I'm using this

Workaround:
sudo service network-manager restart

After that, network-manager performs a new scan, all SSIDs which are available are found again and network-manager connects me to my wifi automatically.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.2.2-0ubuntu0.16.04.3
ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
Uname: Linux 4.4.0-45-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Sat Nov 5 07:53:26 2016
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2014-11-29 (707 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
ProcEnviron:
 LANGUAGE=de_DE
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: Upgraded to xenial on 2016-06-15 (142 days ago)
mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2014-12-14T17:38:01.900655
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