Wired connection not working on fresh install Ubuntu 20.04

Question

I have just finished installing a dual boot Windows 10 / Ubuntu 20.04 on my laptop. My Ethernet connection works fine on Windows but not on Ubuntu.

The settings menu shows "Wired Connected", without question marks. It seems my configuration is fine but when I disable the WiFi (which works fine) I cannot connect to the internet.

I tried many other suggestions on this site (Q1,Q2,Q3,Q4), but none worked.

Additional Information:

sudo lshw -C network

  *-network                 
       description: Wireless interface
       product: MEDIATEK Corp.
       vendor: MEDIATEK Corp.
       physical id: 0
       bus info: pci@0000:2d:00.0
       logical name: wlp45s0
       version: 00
       serial: 34:6f:24:86:55:d1
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=mt7921e driverversion=5.13.0-39-generic firmware=____010000-20220209150915 ip=192.168.0.14 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: iomemory:620-61f iomemory:620-61f iomemory:620-61f irq:190 memory:622c100000-622c1fffff memory:622c200000-622c203fff memory:622c204000-622c204fff
*-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:2e:00.0
       logical name: enp46s0
       version: 15
       serial: 50:eb:f6:30:17:d5
       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=5.13.0-39-generic duplex=full firmware=rtl8168h-2_0.0.2 02/26/15 ip=192.168.0.13 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:18 ioport:3000(size=256) memory:86204000-86204fff memory:86200000-86203fff

lspci -nn | grep -i ethernet

0000:2e:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15)

cat /etc/netplan/*.yaml

# Let NetworkManager manage all devices on this system
network:
  version: 2
  renderer: NetworkManager

cat /usr/lib/NetworkManager/conf.d/10-globally-managed-devices.conf

[keyfile]
unmanaged-devices=*,except:type:wifi,except:type:gsm,except:type:cdma,except:type:ethernet,except:type:wwan

Do you get Ip? type ip addr list Does ping 8.8.8.8 work? — Carles Mateo, Apr 24 '22 at 09:03
what is the result if you invoke "ip a " ? This would be interesting! Yes,there are issues with vanilla installations bt they shoud disappear as soon as you create profiles in modem manager GUI. Other tip: In the CLI do try nmtui-edit and nmtui-connect and nm-connection-editor to see status and options! — opinion_no9, Apr 26 '22 at 20:42

score 0 · Answer 1 · answered Apr 29 '22 at 13:00

There are several reports of issues with driver r8169 and adapter Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168].

Some solve it with driver r8168 or r8168-dkms. You can find r8168-dkms here. Please post what you get.

In addition, please post in the OP the output of several commands:

$ uname -a
$ lsb_release -a
$ inxi -F
$ systemctl status network-manager.service
$ lspci -vnn | grep -i -A 10 ethernet

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Wired connection not working on fresh install Ubuntu 20.04

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