Hello, everyone,

I'm not sure if I'm in the right place, but my network is very slow.
My motherboard is a Gigabyte XB3270QB and in the pci system settings I get a Ltd. RTL8111/8168/8411 PCI Express displayed.

ip addr:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 18:c0:4d:da:8d:52 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.110/24 brd 192.168.1.255 scope global dynamic noprefix route enp4s0
valid_lft 862968sec preferred_lft 862968sec
inet6 fe80::7cca:4d73:e825:82ca/64 scope link noprefix route
valid_lft forever preferred_lft forever

It's a 1GiB interface, but
ethtool enp4s0:

Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: Symmetric Receive-only
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Link partner advertised pause frame use: Symmetric Receive-only
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 100Mb/s
Duplex: Full
Auto negotiation: on
master-slave cfg: preferred slave
master-slave status: slave
Port: twisted pair
PHYAD: 0
Transceiver: external
MDI-X: Unknown
Supports Wake-on: pumbg
Wake on: d
Link detected: yes

Why do I only have 100Mb/s ??

Curiously, the network card shuts down when entering the following command:

sudo ethtool -s enp4s0 speed 1000 duplex full autoneg on

After entering:
sudo ethtool -s enp4s0 speed 100 duplex full autoneg on

it runs again but only with 100 Mb/s

driver problem? Can someone help me please ??
Greetings flipp