Ubuntu: What does it mean “unmanaged device”?



Question:

My network devices seem to be "unmanaged", or perhaps "managed outside the network manager". I assume this because of syslog messages like

Jun 25 18:42:13 lati NetworkManager[811]: <info> (eth2): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]  Jun 25 18:42:13 lati NetworkManager[811]: <info> (eth2): deactivating device (reason 'managed') [2]  Jun 25 18:42:13 lati NetworkManager[811]: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)  

And the link http://bugs.launchpad.net/bugs/191889 is a bug whose title contains "networks that are managed outside of network manager".

My wlan2 connection logs similar messages:

Jun 25 18:42:13 lati NetworkManager[811]: <info> (wlan2): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]  Jun 25 18:42:13 lati NetworkManager[811]: <info> (wlan2): deactivating device (reason 'managed') [2]  Jun 25 18:42:13 lati NetworkManager[811]: <info> (wlan2): device state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42]  Jun 25 18:42:13 lati NetworkManager[811]: <warn> Trying to remove a non-existant call id.  

So, where is my network managed, if not inside the network manager? Are there any consequences for this?


My system info:

  • Ubuntu 14.04.4 LTS (trusty)
  • Architecture: 64 bit
  • Kernel version: 3.16.0-40-generic
  • Dell E7440
  • Bios version: A14
  • Ethernet controller: Intel Corporation Ethernet Connection I218-LM (rev 04)
  • Network controller: Intel Corporation Wireless 7260 (rev 73)

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