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
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