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Andrea Bellizzi
Asked: 2018-09-30 00:42:23 +0800 CST

Ethernet connection Ubuntu 18.04 not working

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I had installed ubuntu 18.04 on my Desktop and network doesn't work, also the icon doesn't appear. I don't have wifi adapter.

this is the output of sudo lshw -C network

*-network UNCLAIMED
description: Ethernet controller
product: Ethernet Connection (2) I219-V
vendor: Interl Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
version:00
width:32 bits
clock: 33Mhz
capabilities: pm msi cap_list
configuration: latency=0
resources: memory:df200000-df21ffff

output of ip link show

1: lo: LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UKNOWN mode DEFAULT grou default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

output of ip address

1: lo: LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UKNOWN mode DEFAULT grou default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
network-manager internet connection ethernet 18.04

1 Answers

  1. Can you make a USB persistent boot drive?

    Does that then pick up your NIC? Were you able to download updates during installation? I had someone break their network software completely one time. I forget the exact method, I think I created one off boot problems troubleshooting. Basically, I used "apt-offline" + persistent boot USB to download the NIC drivers + manager(s) that I needed, using the broken machine and then installed them after rebooting into the broken machine.

    "mkusb" is handy for this if you have another Linux machine.

    Edit:

    1. Install "mkusb" (Linux) or some Windows equivalent (I have had Linux for a long time now, so I always use it to make boot USBs).
    2. Select / toggle between persistant / live, pick the ISO and then create the USB boot stick.
    3. Boot up your machine using one of the persistent options (why persistent? It automatically gives you a partition to store your downloads and allows you to install things onto the USB drive).
    4. Install "apt-offline" (manual) on the USB (this is only if the drive auto-detects your network interface card (NIC) otherwise, the next steps won't help (however, you can carry apt-offline to the broken machine, detect what it needs, take that request back via USB to working machine, get the files and carry them back, your persistent USB being your network cable)
    5. Download the NIC drivers and managers
    6. Use dpkg -i < package name > in the Download folder when booted into the broken machine to install the packages.
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