▶ sudo killall dnsmasq
Works as well, afterwards things work again.

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https://bugs.launchpad.net/bugs/1633912

Title:
  Problem with DNS resolution after suspend

Status in network-manager package in Ubuntu:
  New

Bug description:
  I upgraded my laptop to 16.10 yesterday. Sometimes after suspend I
  have network issues, one time I was not able to connect to a wifi
  network (might report another bug if this occurees again, but maybe it
  is related, as in network-manager is in some broken state after
  suspend).

  Here is whats happening pretty often: After resume from suspend I have
  a solid network connection, no problem to ping machines in LAN or on
  the internet. But DNS resolution is broken until I restart the
  network-manager service.

  I ran ubuntu-bug while DNS was broken, so if anything gets log-ed it
  should be in there.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: network-manager 1.2.4-0ubuntu1
  ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
  Uname: Linux 4.8.0-22-generic x86_64
  ApportVersion: 2.20.3-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Oct 16 21:01:09 2016
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2016-09-28 (18 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  IpRoute:
   default via 192.168.0.1 dev wlp58s0  proto static  metric 600 
   169.254.0.0/16 dev br-541a0f9bec93  scope link  metric 1000 
   172.17.0.0/16 dev docker0  proto kernel  scope link  src 172.17.0.1 linkdown 
   172.18.0.0/16 dev br-541a0f9bec93  proto kernel  scope link  src 172.18.0.1 
   192.168.0.0/24 dev wlp58s0  proto kernel  scope link  src 192.168.0.118  
metric 600
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to yakkety on 2016-10-15 (1 days ago)
  nmcli-nm:
   RUNNING  VERSION  STATE      STARTUP  CONNECTIVITY  NETWORKING  WIFI-HW  
WIFI     WWAN-HW  WWAN    
   running  1.2.4    connected  started  full          enabled     enabled  
enabled  enabled  enabled

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