My Ubuntu Server 16.04 install is not auto-configuring my network settings. After the DHCP setup step the setup program says that my DHCP server isn't responding or that my home network doesn't have one -- which doesn't make much sense since all my other devices have connected just fine and use Dynamic IP assignment.

I've tried over and over again to manually set up a connection through the /etc/network/interfaces file but I'm not getting anywhere and this is getting quite frustrating. What can I do here?

I have a feeling that the installer is not detecting my wireless adapter, as ifconfig shows it disabled by default and my Ethernet (read: wired) adapter as the only one configured. But there doesn't seem to be a way to get the word out to the installer.

PS -- I cannot use a wired connection, because the router is in a different room.

1 Answer 1


Some things you could do to probe if your network is really being probed by Ubuntu:

1. To probe your wireless card, and see if it is recognized on hardware level:

lspci | grep -i wireless

Example output, that will lead us to know that it is a Intel 5300 card:

0c:00.0 Network controller: Intel Corporation PRO/Wireless 5300 AGN [Shiloh] Network Connection

If your card isn't even probed by lspci could be a wireless card that has no drivers, no pci id mapped or bios setting.

2. See if your wireless card isn't soft blocked:

rfkill list

Example output of a card that it is soft blocked:

0: phy0: Wireless LAN
    Soft blocked: yes
    Hard blocked: no

In this case, the wireless card is soft blocked and a rfkill unblock 0(zero is the index, the number at left) should make your card available.

3. Check for missing firmware:

dmesg | grep -i firmware is your friend here. Check for any errors that could be related to wireless firmware, like this one that shows a problem with Intel 7260 firmware loading:

iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-7260-17.ucode failed with error -2

Obviously, a missing firmware issue will print different errors. The same with different wireless adapters.

Further Reading:

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.