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[Dariusz Gadomski <1473458@xxxxxxxxxxxxxxxxxx>]

I have been playing with copying some limit values from /etc/dbus-1/session.conf to system.conf and by bisection I found out that adding the following settings:
<limit name="max_replies_per_connection">50000</limit>
makes the problem disappear.

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https://bugs.launchpad.net/bugs/1473458

Title:
  NM not listing all configured connections

Status in network-manager package in Ubuntu:
  New

Bug description:
  If a large number of networks is configured it may be impossible to
  connect to some of them as a regular user, because they are not
  listed.

  It affects all the versions I tested: trusty, utopic, vivid and wily.

  Steps to reproduce:
  1. Configure a large number of networks (in my case it was 250).
  2. Run nmcli c.

  Expected result:
  nmcli should list all available networks.

  Actual result:
  Only a random (yes, it changes a bit with every call) subset of all connection is displayed - about 130 connections.

  If there are e.g. VPN connections among all connections you may end up
  with being not able to connect to them until you get lucky and the
  connection you need will be "drawn" to the available pool.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: network-manager 0.9.10.0-4ubuntu16
  ProcVersionSignature: Ubuntu 4.0.0-4.6-generic 4.0.7
  Uname: Linux 4.0.0-4-generic x86_64
  ApportVersion: 2.17.3-0ubuntu4
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Jul 10 15:36:35 2015
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  IpRoute:
   default via 192.168.0.1 dev wlan0  proto static  metric 400 
   169.254.0.0/16 dev wlan0  scope link  metric 1000 
   192.168.0.0/24 dev wlan0  proto kernel  scope link  src 192.168.0.14
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to wily on 2015-06-30 (10 days ago)
  nmcli-dev:
   DEVICE  TYPE      STATE      DBUS-PATH                                  CONNECTION  CON-UUID                              CON-PATH                                           
   wlan0   wifi      connected  /org/freedesktop/NetworkManager/Devices/1  UPC0052966  0049ac7c-275c-47a5-beb8-aac3311a371c  /org/freedesktop/NetworkManager/ActiveConnection/0 
   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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