How do I get this RTL board to work, at any boot a failure message is shown

[FAILED] Failed to start Raise network interfaces.
See 'systemctl status networking.service' for details.

$ sudo journalctl -xe
-- Support: https://www.debian.org/support
--
-- An ExecStart= process belonging to unit networking.service has exited.
--
-- The process' exit code is 'exited' and its exit status is 1.
Oct 01 22:13:52 G42 systemd[1]: networking.service: Failed with result 'exit-cod
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- The unit networking.service has entered the 'failed' state with result 'exit-
Oct 01 22:13:52 G42 systemd[1]: Failed to start Raise network interfaces.
-- Subject: A start job for unit networking.service has failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support


$ sudo systemctl status networking.service
● networking.service - Raise network interfaces
Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor prese
Active: failed (Result: exit-code) since Tue 2019-10-01 22:17:42 -03; 29s ago
Docs: man:interfaces(5)
Process: 1904 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=
Main PID: 1904 (code=exited, status=1/FAILURE)

Oct 01 22:17:42 G42 systemd[1]: Starting Raise network interfaces...
Oct 01 22:17:42 G42 ifup[1904]: Cannot find device "eth0"
Oct 01 22:17:42 G42 ifup[1904]: ifup: failed to bring up eth0
Oct 01 22:17:42 G42 systemd[1]: networking.service: Main process exited, code=ex
Oct 01 22:17:42 G42 systemd[1]: networking.service: Failed with result 'exit-cod
Oct 01 22:17:42 G42 systemd[1]: Failed to start Raise network interfaces.

This box was working with Ubuntu and Mint, should be the network manager the trouble maker?

Hi,

this device may need some non-free firmware. Have you installed the firmware-realtek package?

Evo2.

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You can just install it from the .deb file or set up your package manager to do this: https://packages.debian.org/buster/a...nfree/download

...have fun!

I've added non-free and contributor to the repositories after installation
I tried a realtek package called firmware-realtek which didn't help; this firmware-linux-nonfree package didn't help as well

Mabe: https://packages.debian.org/buster/r8168-dkms
just need to ask (no offense ) you have tried searching your thread title on the internet right?

What doesshow?

That's the first I did before posting here. I don't get offended that easy buddy I appreciate your help
Here the output

werner@G42 ~ $ lspci | egrep -i --color 'network|ethernet'
02:00.0 Network controller: Ralink corp. RT3090 Wireless 802.11n 1T/1R PCIe
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller (rev 02)

Right now I'm connected over ethernet, although some times failed

Seems okay so try here: https://wiki.debian.org/WiFi/HowToUse

WiFi is a different board that works properly, the problem lies on ethernet
I've moved a 2nd notebook to debian and unfortunately has the same RTL board
Probably I should look how did Mint to solve this issue

I had a look to Mint box using the same ethernet board, drivers are the same, as well as packages containing them, the only difference is the kernel. Now I'm stuck

It seems there is no solution for this bug, I tried several packages from different repositories, even the drivers supplied by realtek
If the other debian ditros like Mint, Ubuntu and MX did solve this I assume it's a kernel issue

I'm sure there is but I only run sid.

For some unknown reason, at least for me, the installation image doesn't see the right device name which is enp3s0 instead of eth0
Oct 01 22:17:42 G42 systemd[1]: Starting Raise network interfaces...
Oct 01 22:17:42 G42 ifup[1904]: Cannot find device "eth0"
Oct 01 22:17:42 G42 ifup[1904]: ifup: failed to bring up eth0

So the solution is to rename the device to its right name in the configuration file, it took me a long while to discover it. I've still not finished reading The Debian Administrator handbook.
At /etc/network/interfaces.d/setup replace eth0 by enp3s0

auto enp3s0
iface enp3s0 inet dhcp

find out your ethernet device with the command ifconfig or ip link

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