Comment 4 for bug 1569590

I had a similar situation happen where it thought that my wireless device was an ethernet device shortly after the NM upgrade. Sometimes it's detected properly and I see networks in NM's applet, other times it gets confused and thinks it's an ethernet device.

Snapshot of my kernel log when this happened (notice I don't have ath5)

Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.3813] Loaded device plugin: NMWifiFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-wifi.so)
Apr 14 12:20:30 t-XPS-13-9350 systemd[1]: Stopping User Manager for UID 0...
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.3872] Loaded device plugin: NMWwanFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-wwan.so)
Apr 14 12:20:30 t-XPS-13-9350 systemd[879]: Stopped target Default.
Apr 14 12:20:30 t-XPS-13-9350 systemd[879]: Reached target Shutdown.
Apr 14 12:20:30 t-XPS-13-9350 systemd[879]: Stopped target Basic System.
Apr 14 12:20:30 t-XPS-13-9350 kernel: [ 5.004938] IPv6: ADDRCONF(NETDEV_UP): wlp58s0: link is not ready
Apr 14 12:20:30 t-XPS-13-9350 systemd[879]: Stopped target Paths.
Apr 14 12:20:30 t-XPS-13-9350 systemd[879]: Stopped target Timers.
Apr 14 12:20:30 t-XPS-13-9350 systemd[879]: Stopped target Sockets.
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.3914] Loaded device plugin: NMBluezManager (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-bluetooth.so)
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.3931] Loaded device plugin: NMAtmManager (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-adsl.so)
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: nm_device_get_device_type: assertion 'NM_IS_DEVICE (self)' failed
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.3946] device (lo): link connected
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.3951] manager: (lo): new Generic device (/org/freedesktop/NetworkManager/Devices/0)
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.3965] manager: startup complete
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.3986] urfkill disappeared from the bus
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.3999] device (wlp58s0): driver '(null)' does not support carrier detection.
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4000] device (wlp58s0): driver 'brcmfmac' does not support carrier detection.
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4005] manager: (wlp58s0): new Ethernet device (/org/freedesktop/NetworkManager/Devices/1)
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4012] keyfile: add connection in-memory (5fd0e64b-3ac0-4914-bfa0-fc77b53f5e3c,"Wired connection 1")
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4016] settings: (wlp58s0): created default wired connection 'Wired connection 1'
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4022] device (wlp58s0): state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Apr 14 12:20:30 t-XPS-13-9350 systemd[879]: Starting Exit the Session...
Apr 14 12:20:30 t-XPS-13-9350 systemd[879]: Received SIGRTMIN+24 from PID 894 (kill).
Apr 14 12:20:30 t-XPS-13-9350 systemd[1]: Created slice User Slice of root.
Apr 14 12:20:30 t-XPS-13-9350 systemd[1]: Started Session c2 of user root.
Apr 14 12:20:30 t-XPS-13-9350 systemd[1]: Starting User Manager for UID 0...
Apr 14 12:20:30 t-XPS-13-9350 systemd[902]: Reached target Sockets.
Apr 14 12:20:30 t-XPS-13-9350 systemd[902]: Reached target Paths.
Apr 14 12:20:30 t-XPS-13-9350 systemd[902]: Reached target Timers.
Apr 14 12:20:30 t-XPS-13-9350 systemd[902]: Reached target Basic System.
Apr 14 12:20:30 t-XPS-13-9350 systemd[902]: Reached target Default.
Apr 14 12:20:30 t-XPS-13-9350 systemd[902]: Startup finished in 11ms.
Apr 14 12:20:30 t-XPS-13-9350 systemd[1]: Started User Manager for UID 0.
Apr 14 12:20:30 t-XPS-13-9350 kernel: [ 5.041531] brcmf_add_if: ERROR: netdev:wlp58s0 already exists
Apr 14 12:20:30 t-XPS-13-9350 kernel: [ 5.041535] brcmf_add_if: ignore IF event
Apr 14 12:20:30 t-XPS-13-9350 kernel: [ 5.044746] IPv6: ADDRCONF(NETDEV_UP): wlp58s0: link is not ready
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4465] bluez: use BlueZ version 5
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4470] device (wlp58s0): state change: unavailable -> disconnected (reason 'none') [20 30 0]
Apr 14 12:20:30 t-XPS-13-9350 kernel: [ 5.049724] IPv6: ADDRCONF(NETDEV_UP): wlp58s0: link is not ready
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4477] policy: auto-activating connection 'Wired connection 1'
Apr 14 12:20:30 t-XPS-13-9350 systemd[1]: Stopping User Manager for UID 0...
Apr 14 12:20:30 t-XPS-13-9350 systemd[902]: Stopped target Default.
Apr 14 12:20:30 t-XPS-13-9350 systemd[902]: Reached target Shutdown.
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4495] ofono is now available
Apr 14 12:20:30 t-XPS-13-9350 systemd[902]: Starting Exit the Session...
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4503] device (wlp58s0): Activation: starting connection 'Wired connection 1' (5fd0e64b-3ac0-4914-bfa0-fc77b53f5e3c)
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4505] device (wlp58s0): state change: disconnected -> prepare (reason 'none') [30 40 0]
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4506] manager: NetworkManager state is now CONNECTING
Apr 14 12:20:30 t-XPS-13-9350 NetworkManager[746]: <info> [1460650830.4510] device (wlp58s0): state change: prepare -> config (reason 'none') [40 50 0]
Apr 14 12:20:30 t-XPS-13-9350 systemd[902]: Stopped target Basic System.
Apr 14 12:20:30 t-XPS-13-9350 systemd[902]: Stopped target Timers.
Apr 14 12:20:30 t-XPS-13-9350 whoopsie[718]: [12:20:30] offline