I recently got an MSI GS66 Stealth 10SFS laptop on which I immediately installed an Ubuntu 20.04 LTS.
Everything is working fine, except for the Ethernet RJ45 port (that is working and recognized as "Killer W3100" on Windows 10).
I read a few things about such problems and they all ended up using a more recent kernel. Mine is 5.4.20-52, which is on-par with the current 5.4.73 "longterm".
Is there anything I can do to be able to use my ethernet cable?
$ lsb_release -d
Description: Ubuntu 20.04.1 LTS
$ uname -a
Linux aldebaran 5.4.0-52-generic #57-Ubuntu SMP Thu Oct 15 10:57:00 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
$ sudo lshw
...
*-network UNCLAIMED
description: Ethernet controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:3d:00.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: pm msi msix pciexpress cap_list
configuration: latency=0
resources: memory:ad200000-ad2fffff memory:ad300000-ad303fff
...
$ sudo lshw -short | grep network
H/W path Device Class Description
==========================================================
system GS66 Stealth 10SFS (16V1.1)
/0/100/14.3 wlo1 network Wi-Fi 6 AX201
/0/100/1d.6/0 network Intel Corporation
$ lspci -knn
...
3d:00.0 Ethernet controller [0200]: Intel Corporation Device [8086:3101] (rev 02)
Subsystem: Intel Corporation Device [8086:0000]
$ dpkg --get-selections | grep intel
intel-media-va-driver:amd64 install
intel-microcode install
libdrm-intel1:amd64 install
libdrm-intel1:i386 install