No (easy) networking after upgrade to Xubuntu 20.04.1 LTS

Question

After taking the option to upgrade to Xubuntu 20.04.1 LTS I no longer have any networking capability.

E.g. Output of ping www.Google.com :

ping: www.Google.com: Name or service unknown

Output of ping 192.168.0.1 (my network router):

ping: connect: Network is unreachable

At first I thought this was "just a Wi-Fi issue", so I tried tethering, and I am now using a cat 5 cable to my router, with the same result.

Following some stfw, I can manually bring up my Ethernet interface, after each boot with:

sudo ip link set dev enp6s0 down
sudo dhclient enp6s0

Something more permanent (and something that will get WiFi working) would be nice though!

Any ideas please?

There are quite a few things that may have gone wrong. Let's try to gather all of the diagnostics in just one report. Please start here: https://askubuntu.com/questions/425155/my-wireless-wifi-connection-does-not-work-what-information-is-needed-to-diagnos/425180#425180 — chili555, Oct 05 '20 at 00:30
Can you ping an IP address instead of hostname and if yes what is in your /etc/resolv.conf file? — SimpliFixed, Oct 05 '20 at 17:12
@SimpliFixed no: "Network is unreachable" (added to question) — IainCunningham, Oct 05 '20 at 18:45

score 2 · Accepted Answer · answered Oct 05 '20 at 20:32

2

In your wireless script, we see:

NetworkManager is not installed (package "network-manager").

Using the connected ethernet, open a terminal and do:

sudo apt update
sudo apt install network-manager

Reboot. Clicking the Network Manager icon at the top right should now permit you to connect easily with wireless or ethernet.

answered Oct 05 '20 at 20:32

chili555

OK - wired Ethernet now works (thank you!). There is no network manager icon though. I tried to run the script again, and now it gives: 44: Syntax error: "(" unexpected – IainCunningham Oct 05 '20 at 20:54
1

Please remove the old copy of the script (not wireless-info) and download a new copy and try again. Does the icon appear if you do: sudo nm-applet & ? – chili555 Oct 05 '20 at 21:10
Hi, thank you for your help!
Yes, the applet appears if I execute it manually, only for the current session though.

I'm going to modify my session settings file to 'persist' the applet. It seems weird to me that the network-manager modules managed appear to have become 'left out' of my installation during the upgrade, I have no idea how that has happened!

I will try to refresh+run the script again later on (I'm away from the PC in question for a few hours now)
– IainCunningham Oct 06 '20 at 09:27
1

Possibly helpful: https://askubuntu.com/questions/449709/network-indicator-disappeared-in-lubuntu – chili555 Oct 06 '20 at 16:33
Started up my PC again. Applet now appears. Script now runs without showing any issues. No idea what the 'fixes' could have been (beyond applying a power cycle, rather than a reboot) – IainCunningham Oct 06 '20 at 19:40

1 Answers1