If I plug the cable the system sees it:
[ 8690.861361] r8169 0000:04:00.0 enp4s0: Link is Down
[ 8702.078593] r8169 0000:04:00.0 enp4s0: Link is Up - 1Gbps/Full - flow control rx/tx

But no address is given by the router:
$ ip a
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 noprefixroute
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 b4:2e:99:ec:c0:12 brd ff:ff:ff:ff:ff:ff
3: wlx000e2ebc5baa: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:0e:2e:bc:5b:aa brd ff:ff:ff:ff:ff:ff
inet 192.168.1.115/24 brd 192.168.1.255 scope global dynamic noprefixroute wlx000e2ebc5baa
valid_lft 85214sec preferred_lft 85214sec
inet6 fdc2:7ccc:39f:c000:8530:5979:de1b:dbb3/64 scope global temporary dynamic
valid_lft 7036sec preferred_lft 3436sec
inet6 fdc2:7ccc:39f:c000:72e9:9e38:942d:dd2d/64 scope global dynamic mngtmpaddr noprefixroute
valid_lft 7036sec preferred_lft 3436sec
inet6 fe80::ebbf:493d:ff47:ab9b/64 scope link noprefixroute
valid_lft forever preferred_lft forever
4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:6c:6d:96:96 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever

$ sudo lshw -c network
*-network
description: Ethernet interface
product: RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:04:00.0
logical name: enp4s0
version: 16
serial: b4:2e:99:ec:c0:12
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=6.11.0-9-generic duplex=full firmware=rtl8168h-2_0.0.2 02/26/15 latency=0 link=yes multicast=yes port=twisted pair spe
ed=1Gbit/s
resources: irq:33 ioport:e000(size=256) memory:fcc04000-fcc04fff memory:fcc00000-fcc03fff

I tried many times to restart the system and even trying some changes on the router with no success. The wired RaspBerry 5 on the side is instead working properly.


For information, looking for solutions I've seen on internet a similar problem (with no answer anyway): https://askubuntu.com/questions/1530...ine-on-windows