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[Launchpad Bug Tracker <1441893@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/1441893

Title:
  Can't connect to my wi-fi N network on vivid: authentication timed out

Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  I can't connect to my wi-fi with my laptop.

  I get this error message in the syslog.
  Apr  8 22:25:35 ubuntu kernel: [  793.895555] wlan0: authentication with 10:bf:48:e5:d1:b8 timed out

  ubuntu@ubuntu:~$ lshw -c network
  WARNING: you should run this program as super-user.
    *-network
         description: Ethernet interface
         product: Ethernet Connection I217-V
         vendor: Intel Corporation
         physical id: 19
         bus info: pci@0000:00:19.0
         logical name: eth0
         version: 05
         serial: 00:90:f5:f8:ef:86
         size: 1Gbit/s
         capacity: 1Gbit/s
         width: 32 bits
         clock: 33MHz
         capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
         configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=2.3.2-k duplex=full firmware=0.12-3 ip=192.168.2.208 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
         resources: irq:29 memory:f7e00000-f7e1ffff memory:f7e3d000-f7e3dfff ioport:f080(size=32)
    *-network
         description: Wireless interface
         product: Wireless 3160
         vendor: Intel Corporation
         physical id: 0
         bus info: pci@0000:03:00.0
         logical name: wlan0
         version: 83
         serial: a0:88:69:39:ae:d6
         width: 64 bits
         clock: 33MHz
         capabilities: bus_master cap_list ethernet physical wireless
         configuration: broadcast=yes driver=iwlwifi driverversion=3.19.0-10-generic firmware=25.15.12.0 latency=0 link=no multicast=yes wireless=IEEE 802.11abgn
         resources: irq:32 memory:f7c00000-f7c01fff

  Attached is the full syslog.
  This machine has been working more or less ok on vivid for at least three months. Sometimes it refused to connect to the wi-fi, but after a restart it started working.
  Recently I changed the network from G to N, and recently did an upgrade to the latest vivid. I had some problems booting, so I also recently fully removed upstart. It boots fine with systemd, and everything else seem to be working.
  I've just tested with a daily vivid live USB, and the same problem happened.

  I'm connecting to the same network using the same password with my
  other machine.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: network-manager 0.9.10.0-4ubuntu11
  ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
  Uname: Linux 3.19.0-10-generic x86_64
  ApportVersion: 2.16.2-0ubuntu4
  Architecture: amd64
  CasperVersion: 1.356
  CurrentDesktop: Unity
  Date: Wed Apr  8 22:20:03 2015
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  IpRoute:
   default via 192.168.2.1 dev eth0  proto static  metric 1024
   169.254.0.0/16 dev eth0  scope link  metric 1000
   192.168.2.0/24 dev eth0  proto kernel  scope link  src 192.168.2.208
  LiveMediaBuild: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: network-manager
  UpgradeStatus: No upgrade log present (probably fresh install)
  nmcli-dev:
   DEVICE  TYPE      STATE         DBUS-PATH                                  CONNECTION          CON-UUID                              CON-PATH
   eth0    ethernet  connected     /org/freedesktop/NetworkManager/Devices/1  Wired connection 1  cf5cb021-0df1-4f13-b74c-c3e9c6749a30  /org/freedesktop/NetworkManager/ActiveConnection/2
   wlan0   wifi      disconnected  /org/freedesktop/NetworkManager/Devices/2  --                  --                                    --
   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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