This looks like a legit problem in NM's DeviceFactory code. For this ath
device, it detects the device as Ethernet rather than wireless.

Apr 13 09:34:20 ja-laptop kernel: IPv6: ADDRCONF(NETDEV_CHANGE): enp3s0: link 
becomes ready
Apr 13 09:34:20 ja-laptop NetworkManager[630]: <info>  [1460496860.6955] 
manager: (wlp1s0): new Ethernet device 
(/org/freedesktop/NetworkManager/Devices/2)
Apr 13 09:34:20 ja-laptop NetworkManager[630]: <info>  [1460496860.7136] 
keyfile: add connection in-memory (cb7547d7-4155-4880-adea-c8f5b82b0a39,"Wired 
connection 2")
Apr 13 09:34:20 ja-laptop NetworkManager[630]: <info>  [1460496860.7250] 
settings: (wlp1s0): created default wired connection 'Wired connection 2'
Apr 13 09:34:20 ja-laptop NetworkManager[630]: <info>  [1460496860.7490] device 
(wlp1s0): state change: unmanaged -> unavailable (reason 'managed') [10 20 2]

Triaged/High; there are most likely many more ath5 wifi devices around.

** Changed in: network-manager (Ubuntu)
       Status: New => Triaged

** Changed in: network-manager (Ubuntu)
   Importance: Undecided => High

** Changed in: network-manager (Ubuntu)
    Milestone: None => ubuntu-16.04

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https://bugs.launchpad.net/bugs/1569590

Title:
  wireless card disabled in network-manager

Status in network-manager package in Ubuntu:
  Triaged

Bug description:
  Using xenial on Asus EeePC 900

  Network manager has worked fine with the wireless card on this
  machine, until the update of 12 April.

  Now the wireless card appears greyed out in the nm-applet interface
  with no SSIDs visible. Ethernet still works.

  wicd works on this machine, but I'd prefer not to have to install
  that.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: network-manager 1.1.93-0ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
  Uname: Linux 4.4.0-18-generic i686
  ApportVersion: 2.20.1-0ubuntu1
  Architecture: i386
  Date: Wed Apr 13 09:55:01 2016
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   # Include files from /etc/network/interfaces.d:
   source-directory /etc/network/interfaces.d
  IpRoute:
   default via 192.168.1.1 dev enp3s0  proto static  metric 100 
   192.168.1.0/24 dev enp3s0  proto kernel  scope link  src 192.168.1.67  
metric 100
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: network-manager
  UpgradeStatus: No upgrade log present (probably fresh install)
  nmcli-dev:
   DEVICE  TYPE      STATE        DBUS-PATH                                  
CONNECTION          CON-UUID                              CON-PATH              
                             
   enp3s0  ethernet  connected    /org/freedesktop/NetworkManager/Devices/1  
Wired connection 1  745074e0-abba-4f29-8c5d-1bcfbcb13e3a  
/org/freedesktop/NetworkManager/ActiveConnection/0 
   wlp1s0  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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