No internet connection (both ethernet & wifi) after 22.04 upgrade

[stinktier2]

Hiya all, I just upgraded my Lenovo Thinkpad X220 to the latest Xubuntu 22.04 (from 20.04). After the reboot no internet connection is possible – neither wifi nor ethernet. In the network applet both Ethernet Network and Wi-Fi Networks just "disconnected". I can "see" the available WLANs, but the computer just won't connect successfully.

Something must have been broken during the upgrade, but for the life of me I just can't find out what. I don't even have an idea how and where to look...

Please help!

[1fallen]

Not sure I can help but please give this shot:

sudo nmcli networking on

[stinktier2]

Not sure I can help but please give this shot:

sudo nmcli networking on

Nope, nothing changed. Even after a reboot.

[1fallen]

One more:

sudo nmcli n on

If not try to use nmtui-tool

nmtui

If none of the above works, well I hate saying but a fresh install will be your only other option.
Good Luck

[stinktier2]

One more:

sudo nmcli n on

If not try to use nmtui-tool

nmtui

If none of the above works, well I hate saying but a fresh install will be your only other option.
Good Luck

Nothing worked.

nmtui

can not activate any Wired or Wireless connection.
With my Wired connection the error is "[...] Connection 'Wired connection 1' is not available on device enp0s25 because device has no carrier"
With my Wi-Fi connection the error is "Activation failed: Secrets were required , but not provided" (This is with an open WLAN.)

[1fallen]

Interesting, but that sucks I think your the third or forth poster to find this mishap:

systemctl status NetworkManager

Maybe?

[stinktier2]

Interesting, but that sucks I think your the third or forth poster to find this mishap:

systemctl status NetworkManager

Maybe?

This is the result:


What does that mean?

[1fallen]

humm, a possible maybe:

sudo dhclient

Then if that works we need to look at other things to find why.

[stinktier2]

humm, a possible maybe:

sudo dhclient

Then if that works we need to look at other things to find why.

Nothing happens. I enter my password and then... nothing. No prompt, no error, nothing.

EDIT: After a couple of minutes the prompt became available and Ubuntu finished whatever it was doing in the background. The wired connection was established, but no actual connection (websites, updates) is happening. The Vivaldi browser simply states "No internet". Wireless still seems impossible.

[1fallen]

Nothing happens. I enter my password and then... nothing. No prompt, no error, nothing.

I'm not sure i under stand? did it show anything like:

 sudo dhclient
[sudo] password for me: 
RTNETLINK answers: File exists
Setting LLMNR support level "yes" for "2", but the global support level is "no".