Public bug reported:

After resuming from suspend on my laptop, I have wifi enabled, but
Network Manager does not automatically reconnect, and it's list of
available wifi networks is blank.

If I run `sudo service network-manager restart`, then this fixes
everything and it automatically detects and connects to my wifi hotspot,
but this shouldn't be necessary.

This problem seems specific to 16.04. Under 14.04, NM worked perfectly.
After I upgraded my 14.04 install to 16.04 it started happening,
however, I assumed this was likely due to some broken config file
leftover from the upgrade. However, I recently did a fresh install to
the same laptop on a blank hard drive, and the problem still exists.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.2.2-0ubuntu0.16.04.3
ProcVersionSignature: Ubuntu 4.4.0-62.83-generic 4.4.40
Uname: Linux 4.4.0-62-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: GNOME
Date: Sat Feb 11 13:25:56 2017
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2017-01-21 (20 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
IpRoute:
 default via 192.168.1.1 dev wlp3s0  proto static  metric 600 
 169.254.0.0/16 dev virbr0  scope link  metric 1000 linkdown 
 192.168.1.0/24 dev wlp3s0  proto kernel  scope link  src 192.168.1.122  metric 
600 
 192.168.121.0/24 dev virbr1  proto kernel  scope link  src 192.168.121.1 
linkdown 
 192.168.122.0/24 dev virbr0  proto kernel  scope link  src 192.168.122.1 
linkdown
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
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

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1663918

Title:
  Network Manager fails to reconnect to wifi after resuming from suspend

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