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[Elena <elena.bcn@xxxxxxxxx>]

This bug occurs to me as well on a clean install of Ubuntu 15.10 (64 bits).
I have it installed on a Dell xps lalptop (I can give more details if needed).

Anyway... I've notice a very important detail. This behaviour only
happens to me when I close the laptop and it is suspended automatically.

That does NOT happen if I suspend it manually.

The network-manager version installed is: 1.0.4-0ubuntu5.1.

Tell me if I can help giving any other information

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https://bugs.launchpad.net/bugs/1380480

Title:
  network disabled after suspend - resume

Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  Background: 
  this started to happen after the upgrade to Utopic Beta 1

  3) When I close the laptop's lid and open, the wifi should reconnect
  4) Wifi does not reconnect. It says "Wi-Fi networks" - "disconnected" when I left-click on NM icon in notif area. However the context menu (right-click) has items "Enable networking" and "Enable Wi-Fi" both with checkmarks.

  Workarounds: 
  switch off - on the physical switch on laptop OR  two times go and select "Enable networking" in the NM context menu (after first time it removes checkmark and the  "Enable Wi-Fi" item - visual feedback of being disabled).

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: network-manager 0.9.8.8-0ubuntu27
  ProcVersionSignature: Ubuntu 3.16.0-21.28-generic 3.16.4
  Uname: Linux 3.16.0-21-generic x86_64
  ApportVersion: 2.14.7-0ubuntu5
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Sat Oct 11 22:33:06 2014
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2013-07-21 (447 days ago)
  InstallationMedia: Xubuntu 13.04 "Raring Ringtail" - Release amd64 (20130423.1)
  IpRoute:
   default via 192.168.10.1 dev wlan0  proto static 
   10.9.9.0/24 dev vboxnet0  proto kernel  scope link  src 10.9.9.1 
   192.168.10.0/24 dev wlan0  proto kernel  scope link  src 192.168.10.239  metric 9
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to utopic on 2014-09-25 (16 days ago)
  mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2014-07-19T15:03:44.847279
  nmcli-dev:
   DEVICE     TYPE              STATE         DBUS-PATH                                  
   eth0       802-3-ethernet    unavailable   /org/freedesktop/NetworkManager/Devices/1  
   wlan0      802-11-wireless   connected     /org/freedesktop/NetworkManager/Devices/0
  nmcli-nm:
   RUNNING         VERSION    STATE           NET-ENABLED   WIFI-HARDWARE   WIFI       WWAN-HARDWARE   WWAN      
   running         0.9.8.8    connected       enabled       enabled         enabled    enabled         enabled

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