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[Wolf Rogner <war@xxxxxx>]

back to suggestion #12:

It does not fire (still don't know why)

However, running iwlist scan (as sudo) DOES reconnect.

Today I connected to another network (which I use regulary. The
connection was established immediately after resume.

After putting the machine to sleep again, no reconnect occured after
resume.

Thus my observation:

If after wake-up the network environment is the same, network manager DOES NOT reconnect.
If after wake-up the network is different (other SSIDs or SSID not found) a scan is launched automatically and a reconnect occurs.

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https://bugs.launchpad.net/bugs/1448555

Title:
  network-manager does not autoconnect to wifi network after resume from
  suspend

Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  After upgrading to 15.04 network manager does not reconnect to the
  wifi network after resuming from a suspend to memory.

  Workaround:
  disable and re-enable wireless network -> connects immediately

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: network-manager 0.9.10.0-4ubuntu15
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  NonfreeKernelModules: nvidia wl
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat Apr 25 23:53:54 2015
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2013-05-17 (708 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64+mac (20130424)
  IpRoute:
   default via 10.1.0.254 dev wlan0  proto static  metric 1024 
   10.0.0.0/8 dev wlan0  proto kernel  scope link  src 10.1.0.103 
   169.254.0.0/16 dev wlan0  scope link  metric 1000
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to vivid on 2015-04-25 (0 days ago)
  nmcli-dev:
   DEVICE             TYPE      STATE         DBUS-PATH                                  CONNECTION  CON-UUID                              CON-PATH                                           
   wlan0              wifi      connected     /org/freedesktop/NetworkManager/Devices/1  rsb_hs      d8793959-2da1-4dc6-85ad-2dcf9e36e64b  /org/freedesktop/NetworkManager/ActiveConnection/1 
   EC:88:92:61:E9:5F  bt        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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