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[Launchpad Bug Tracker <1455967@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/1455967

Title:
  NM disables accept_ra for an IPv6 connection, where it should enable
  it!

Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  Guys,

  I just installed Ubuntu 15.04 on a brand new Dell E7440 Laptop and
  Network Manager disable the Router Advertisement for my IPv6
  connection!

  My connection settings for both wired and WiFi have:

  Edit Connection -> Edit Settings -> IPv6 Settings -> Method =
  Automatic

  But, take a look:

  ---
  root@ultra:~# cat /proc/sys/net/ipv6/conf/wlan0/accept_ra
  0
  root@ultra:~# cat /proc/sys/net/ipv6/conf/eth0/accept_ra
  0
  ---

  So, my IPv6 connection doesn't work. I need to manually re-enable it,
  by running:

  ---
  echo 1 > /proc/sys/net/ipv6/conf/wlan0/accept_ra
  ---

  Then, my IPv6 works again! Everytime I reconnect to a network, I need
  to "echo 1 > accept_ra" again... Very annoying.

  Please, help!

  Thanks in advance...

  Cheers!
  Thiago

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: network-manager 0.9.10.0-4ubuntu15.2
  ProcVersionSignature: Ubuntu 3.19.0-17.17-generic 3.19.6
  Uname: Linux 3.19.0-17-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun May 17 15:02:12 2015
  EcryptfsInUse: Yes
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2015-05-15 (2 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  IpRoute:
   default via 10.0.1.1 dev wlan0  proto static  metric 400
   10.0.1.0/24 dev wlan0  proto kernel  scope link  src 10.0.1.36
   169.254.0.0/16 dev wlan0  scope link  metric 1000
   192.168.122.0/24 dev virbr0  proto kernel  scope link  src 192.168.122.1
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: No upgrade log present (probably fresh install)
  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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