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I tried installing Ubuntu Server 20.04 on my Gigabyte B550i with an Realtek Ethernet Controller and wireless. I want to use ethernet (I don't care about wireless), but I wasn't able to set it up during installation and cat /etc/netplan.*yaml returns just:

network:
      version 2

and lshw -C network lists both networks, the ethernet one unclaimed, the wireless one diabled. /etc/network/interfaces is empty, I tried different file contents, but nothing worked.

What am I doing wrong? I tried installing some kind of drivers, but didn't succeed.

EDIT

ip a returns

1: lo: <LOOPBACK,UP, LOWER_UP> mtu 65536 qdisc noqeue state UNKOWN group 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 preffered_lft forever
    inet6 ::1/128 scope ost
        valid_lft forever preferred_lft forever
2: wlp6s0 <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 34:cf:f6:b7:d4:8c brd ff:ff:ff:ff:ff:ff:ff

EDIT 2 Images

lshw -C network

lspci -k

Lukas
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3 Answers3

7

Your netplan .yaml file is broken.

ls -al /etc/netplan # get .yaml filename

sudo lshw -C network # identify ethernet device name, enxxxxxx

Edit it with:

sudo pico /etc/netplan/*.yaml <-- change the * to your filename

Initially make its content the following, with EXACLY the same spacing, indentation, and no tabs:

network:
  version: 2
  renderer: networkd
  ethernets:
    en01:
      dhcp4: true
      dhcp6: true
      optional: true
  wifis:
    wlp6s0:
      dhcp4: true
      dhcp6: true
      access-points:
        "YourWifiNetworkName":
          password: "WifiNetworkPassword"

sudo netplan generate

sudo netplan apply

reboot

Update #1:

BIOS

You have BIOS version F1.

The current BIOS is version F2a, dated 6/16/2020, and can be downloaded here.

Note: Confirm that I have the correct web page for your motherboard model #.

Note: Have good backup before updating the BIOS.

kernel

With the newer ethernet controller that you have, you may need to run with a newer kernel than stock from Ubuntu 20.04.1.

Go here to download the latest 5.8.3 kernel. Get the 4 regular .deb files, not the lowlatency files.

Update #2:

Word is that not even kernel 5.8.3 supports the RTL8125! Kernel 5.9 is supposed to support it, but there is only a 5.9-rc2 (rc2 means release candidate #2) version available now... see https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.9-rc2/.

In the mean time, download this Linux driver from Realtek, and it should work. https://www.realtek.com/en/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-pci-express-software. Get the one for "2.5G Ethernet LINUX driver r8125 for kernel up to 5.6"... and use your original 5.4.x kernel.

Update #3:

Ordered a $13 TP-Link USB 3.0 Ethernet dongle to be able to connect and download/install required Ubuntu packages. https://www.amazon.com/dp/B00YUU3KC6

Update #4:

Installed USB to Ethernet adapter. Installed build-essential. Built driver. Everything works. Wireless will be completed when the need arises. Will need to install wpasupplicant.

heynnema
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  • I'm not able to find the ethernet device name. I updated the original post with some images. – Lukas Aug 25 '20 at 17:56
  • BIOS is updated now. – Lukas Aug 25 '20 at 18:36
  • @hertelukas Does `sudo lshw -C network` now give us an ethernet device name? If not, do backups, then try the newer kernel. – heynnema Aug 25 '20 at 18:40
  • no, output is the same – Lukas Aug 25 '20 at 18:42
  • @hertelukas Do the newer 5.8.3 kernel. See if you find a device name with `sudo lshw -C network`, then edit the .yaml file, etc. Report back. – heynnema Aug 25 '20 at 18:47
  • still the same. `uname -r` returns 5.8.3, but there is no name with `sudo lshw -C network`. (But I tried setting up the Wifi for now, so the second network is no longer DISABLED) – Lukas Aug 25 '20 at 19:27
  • @hertelukas Just to eliminate a gross software issue, try booting to a Ubuntu Live DVD/USB and see if `ip ` or `sudo lshw -C network` show the ethernet device name. – heynnema Aug 25 '20 at 19:32
  • @hertelukas I may have found a Linux driver for the RTL8125 ethernet card at https://www.realtek.com/zh-tw/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-pci-express-software, get the one for "2.5G Ethernet LINUX driver r8125 for kernel up to 5.6". Report back. – heynnema Aug 25 '20 at 19:40
  • @hertelukas Ah! See https://askubuntu.com/questions/1259947/cant-get-rtl8125b-working-on-20-04 – heynnema Aug 25 '20 at 19:44
  • @hertelukas Here's the English download page... https://www.realtek.com/en/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-pci-express-software – heynnema Aug 25 '20 at 19:46
  • @hertelukas See Update #2 in my answer. – heynnema Aug 25 '20 at 19:54
  • how can I update the driver? When trying to run the autorun.sh script with `chmod +x autorun.sh` and `./autorun.sh` `Check old driver and unload it. Build the module and install ./autron.sh: 30: make: not found` returns – Lukas Aug 25 '20 at 20:00
  • @hertelukas `sudo apt-get update`, `sudo apt-get install build-essential` should probably install the missing make command. – heynnema Aug 25 '20 at 20:09
  • How should I do that without internet? – Lukas Aug 25 '20 at 20:12
  • @hertelukas Ehh... you're right. How did you get the .deb files for 5.8.3? If you do Thomas Wards wireless answer, with my comments, you can get it that way. – heynnema Aug 25 '20 at 20:14
  • I used a flash drive. But I never installed a package with a flash drive. (Furthermore, I'm back on the initial installation). For Thomas Solution I seem to need `wpasupplicant`, same issue I think? At the moment on startup, I allways get stuck for 2 minutes in `A start job is running for Wait for Network is Configured` and I'm still not connected (pretty sure I entered the netplan details correctly) – Lukas Aug 25 '20 at 20:18
  • @hertelukas http://mirrors.kernel.org/ubuntu/pool/main/w/wpa/wpasupplicant_2.9-1ubuntu4_amd64.deb – heynnema Aug 25 '20 at 20:28
  • @hertelukas For netplan, you can only put the wireless detail in the .yaml, not the ethernet stuff, as we don't have all of the info, or driver, yet. – heynnema Aug 25 '20 at 20:31
  • it finally worked! Thank you so much. (Just one HDD is broken, so I still have to wait to use my NAS) – Lukas Sep 01 '20 at 13:10
  • @hertelukas Great news! Thanks for the update. What enxxxxxx device did the primary RTL8125 ethernet device show up as? I want to edit my answer with that detail. And the new driver worked? And you're running kernel 5.4.x? And wpasupplicant for the wireless? – heynnema Sep 01 '20 at 13:27
  • Yes, I'm using Kernel 5.4.0. Furthermore, the device name is `eno1`. The driver is working, just ran autorun.sh (and I had to `sudo apt-get install build-essential`). I didn't try wpasupplicant, because I don't need wireless at the moment. If I decide to use it, I'll let you know. – Lukas Sep 01 '20 at 15:44
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You can try configuring this for Wifi but it'll require you to do some more work.

Your wifi device is: wlp6s0

Try this netplan configuration in place of whatever you currently have (AND MAKE SURE YOU MATCH SPACING!), then run sudo netplan test and reboot the server after:

network:
  version: 2
  renderer: networkd
  wifis:
    wlp6s0:
      dhcp4: yes
      dhcp6: yes
      access-points:
        "YourWifiNetworkName":
          password: "WifiNetworkPassword"

Replace YourWifiNetworkName and WifiNetworkPassword accordingly to manually set the wifi network and its connection authentication password that your server will connect to. You do need the quotes around those two arguments, as shown in the Netplan Examples and the exact example I referenced.

Thomas Ward
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  • Comments are not for extended discussion; this conversation has been [moved to chat](https://chat.stackexchange.com/rooms/112277/discussion-on-answer-by-thomas-ward-ubuntu-server-20-04-no-internet-connection-n). – Thomas Ward Aug 25 '20 at 20:51
  • Remember to change `test` to `try`, and you also need to install `wpasupplicant`. I still think the sequence should be generate/apply, or generate/try/apply. – heynnema Aug 25 '20 at 23:25
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I solved it by pulling out my bios/uefi battery for several minutes and it worked like a charm! It happened twice and I solved it twice this way. I did everything listed here and more but it didn't solved my problem. I didn't touch bios/uefi settings before. This is not a joke. I got the same problem with intel network adapter on Ubuntu 20.04. Terminal lshw listed my adapter as UNCLAIMED. I tried every page with the same problem but it didn't solved this issue.

rk18rywusj
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