Ubuntu 16.04.1 xenial on bare metal Intel NUC.

I've been using a wired connection for sometime now and wish to now switch to wireless (relocating box).

I've connected to the wireless router. A notification comes up saying I'm connected to it. The connection information says my active network connection is to that wireless router with an IP of, and a default route and DNS of

The wired connection was

But when I ping the gateway at it says:

From Destination Host Unreachable

I've tried the below that I've read elsewhere (eg. https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1576215) is meant to fix this problem:

sudo service network-manager restart

But this doesn't fix the problem and I cannot use the wireless network.

Any ideas?

Updated with more information

  • Based on initial comments

    $ cat /etc/resolv.conf

    # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver nameserver nameserver

    $ cat /etc/network/interfaces

    # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback

    source /etc/network/interfaces.d/*.cfg

    $ ls -la /etc/network/interfaces.d/

    total 4 -rw-r--r-- 1 root root 165 Dec 30 10:48 eth0.cfg

    $ cat /etc/network/interfaces.d/eth0.cfg

    auto eth0 iface eth0 inet static # address address netmask # gateway gateway dns-nameservers

I haven't tried the modprobe suggestion in a comment as it sounds permanent. I will do a bit of reading first.

Further investigations

Doesn't this seem odd:

$ iwconfig
lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"starkiller24"  
      Mode:Managed  Frequency:2.417 GHz  Access Point: xx:xx:xx:xx:xx:xx   
      Bit Rate=144.4 Mb/s   Tx-Power=22 dBm   
      Retry short limit:7   RTS thr:off   Fragment thr:off
      Power Management:on
      Link Quality=70/70  Signal level=-29 dBm  
      Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
      Tx excessive retries:0  Invalid misc:42   Missed beacon:0

eth0      no wireless extensions.

$ sudo ifup wlan0
Unknown interface wlan0

Would creating an interface in /etc/network/interfaces.d help? And if so why hasn't one been created?

  • 2
    Is the wired connection unplugged ? Jan 29, 2017 at 12:23
  • Please edit the question to include results for cat /etc/resolv.conf and cat /etc/network/interfaces
    – Jeremy31
    Jan 29, 2017 at 13:19
  • George was right. You need to simply unplug the Ethernet cable or remove the driver from the Kernel (modprobe -r driver_name) and then the WiFi should automatically take over. Jan 29, 2017 at 16:54
  • Thanks for the feedback. I'll update the question and try the suggestion tongiht (12 hours).
    – HankCa
    Jan 29, 2017 at 21:35
  • Oh, and i had unplugged the ethernet.
    – HankCa
    Jan 30, 2017 at 2:47

1 Answer 1


As noted in my answer I had the interface for eth0 defined in /etc/network/interfaces.d/eth0.cfg. I simply had to remove that and wireless now works! So must be some kind of automatic configuration must be happening.

I played around with defining a wlan0.cfg but that was unnsuccessful. I'm sure I just had a settings mismatch and I will attempt this task again at another time (for educational purposes).

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