LAN: Intel Ethernet interface issue on Manjaro Gnome

Hey,
New Manjaro Gnome latest version was installed.
Thinkpad x280 laptop works fine with wifi, but ethernet LAN does not work.

Screenshot from 2020-06-09 10-18-53
"Cable unplugged" is gray.

inxi -Fx shows network driver:

Network:   Device-1: Intel Ethernet I219-V vendor: Lenovo driver: e1000e v: 3.2.6-k port: efa0 bus ID: 00:1f.6 
           IF: enp0s31f6 state: down mac: xxxxxxxxxxxxxx
           Device-2: Intel Wireless 8265 / 8275 driver: iwlwifi v: kernel port: efa0 bus ID: 3b:00.0 
           IF: wlp59s0 state: up mac: xxxxxxxxxxx 
           IF-ID-1: wwp0s20f0u6 state: down mac: xxxxxxxxxxxxx 

Screenshot from 2020-06-09 11-49-03
It looks like disabled by default.

Can anyone help me to enable this device Ethernet ?
Thanks!

Your last picture is for a USB to Ethernet Device. But your inxi output shows a internal Ethernet Adapter.

Which one is it? Also if you are sure you plugged a Ethernet cable in, try a different one.

I use the docking station for thinkpad.
image-a7d9a8c6-e833-4c2d-b153-364af2399ada
Ethernet connects with the docking station.

Three weeks ago it worked fine with Manjaro KDE.
Then today it doesn't work

So what happens if you plug it in your ThinkPad directly?

If I plug it in my Thinkpad, then network symbol reacts on the top panel and network manager refrehs the connection automatically, then Ethernet stays off

In this case you need to check the journal. Gnome uses by default the Networkmanager.

journalctl -b -u NetworkManager.service 

Sorry,
I found out that LAN port (Hardware) has the issue. Manjaro Gnome is not guilty.

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