Note, it looks like the problem is that the original patch fixes up the
libnm-util version of nm-settings-wireless.c which has been deprecated.
Instead the libnm-core version of nm-settings-wireless.c needs to be
updated.  I'm testing this now for a touch build and will report back
here if it works.

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https://bugs.launchpad.net/bugs/1557026

Title:
  Network Manager sets powersave off by default in xenial

Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  Nwetwork Manager sets Power Management:off in iwconfig by default.

  It can be changed per connection by adding powersave=1.

  In 14.04 powersave was set on by default and could be disabled per connection.
  That seemed to be reasonable.

  If the default has been changed for some reason, it is better to make a NM 
global setting.
  It is not handy to change every connection manually, and most users will not 
be able to do it.

  After upgrade to 16.04 power consumption will increase.

  It is also funny that pm-tools set powersave on, but NM reverts this
  setting.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: network-manager 1.0.4-0ubuntu10
  ProcVersionSignature: Ubuntu 4.4.0-12.28-generic 4.4.4
  Uname: Linux 4.4.0-12-generic x86_64
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon Mar 14 18:41:38 2016
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2016-02-29 (13 days ago)
  InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 
(20160217.1)
  IpRoute:
   default via 192.168.1.1 dev wlan0  proto static  metric 600 
   169.254.0.0/16 dev wlan0  scope link  metric 1000 
   192.168.1.0/24 dev wlan0  proto kernel  scope link  src 192.168.1.125  
metric 600
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to xenial on 2016-03-12 (1 days ago)
  modified.conffile..etc.NetworkManager.NetworkManager.conf: [modified]
  mtime.conffile..etc.NetworkManager.NetworkManager.conf: 
2016-03-13T01:40:30.748775
  nmcli-dev:
   DEVICE  TYPE      STATE        DBUS-PATH                                  
CONNECTION  CON-UUID                              CON-PATH                      
                     
   wlan0   wifi      connected    /org/freedesktop/NetworkManager/Devices/1  
Voxnet      eafa9e18-fa85-4d9a-a705-6a3e97a45fbc  
/org/freedesktop/NetworkManager/ActiveConnection/1 
   eth0    ethernet  unavailable  /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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