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[Launchpad Bug Tracker <1522057@xxxxxxxxxxxxxxxxxx>]

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

** Changed in: network-manager (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1522057

Title:
  DNS resolution stops working after sometime

Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  DNS resolution stops working after sometime (usually 10-20 minutes) in
  Lubuntu 15.10

  The problem can be temporarily corrected after restarting network-
  manager using systemctl, but it starts again after 10-20 minutes.
  Looks like network-manager is not configuring dnsmasq properly.

  Output from 'nslookup google.com':
  ~~~~~
  Server:		127.0.1.1
  Address:	127.0.1.1#53

  ** server can't find google.com: REFUSED
  ~~~~~

  Output from 'tcpdump -i lo port 53' while running above command:
  ~~~~~
  20:16:59.235879 IP localhost.38045 > comp0.arhome.info.domain: 28529+ A? google.com. (28)
  20:16:59.286851 IP comp0.arhome.info.domain > localhost.38045: 28529 Refused 0/0/0 (28)
  ~~~~~

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: network-manager 1.0.4-0ubuntu5.1
  ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
  Uname: Linux 4.2.0-18-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  CRDA:
   country IN: DFS-JP
   	(2402 - 2482 @ 40), (N/A, 20), (N/A)
   	(5170 - 5250 @ 80), (N/A, 20), (N/A)
   	(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS
   	(5735 - 5835 @ 80), (N/A, 20), (N/A)
  CurrentDesktop: LXDE
  Date: Wed Dec  2 20:14:32 2015
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2015-09-25 (68 days ago)
  InstallationMedia: Lubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  IpRoute:
   default via 172.16.84.1 dev wlan0  proto static  metric 600 
   172.16.84.0/22 dev wlan0  proto kernel  scope link  src 172.16.84.50  metric 600 
   200.1.1.2 via 172.16.84.1 dev wlan0  proto dhcp  metric 600
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to wily on 2015-11-06 (25 days ago)
  nmcli-dev:
   DEVICE    TYPE      STATE        DBUS-PATH                                  CONNECTION       CON-UUID                              CON-PATH                                           
   wlan0     wifi      connected    /org/freedesktop/NetworkManager/Devices/1  nn0.arhome.info  bab29dc2-8a79-4170-8253-277286712124  /org/freedesktop/NetworkManager/ActiveConnection/0 
   eth0      ethernet  unavailable  /org/freedesktop/NetworkManager/Devices/2  --               --                                    --                                                 
   vboxnet0  ethernet  unmanaged    /org/freedesktop/NetworkManager/Devices/3  --               --                                    --                                                 
   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'.

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