Ubuntu中没有wired connected的解决方案

本文最后更新于：2025年4月14日晚上

突然发现我的 Ubuntu 22.04 里没有有线连接的配置项，本文记录解决方案。

问题复现

没有有线连接配置项，插网线也不行。

解决方案

输入命令：

1	`sudo lshw -c Network`

检查 network 的状态，当前出问题的输出为：

*-network:1 UNCLAIMED
     description: Ethernet controller
     product: Ethernet Connection (17) I219-LM
     vendor: Intel Corporation
     physical id: 1f.6
     bus info: pci@0000:00:1f.6
     version: 11
     width: 32 bits
     clock: 33MHz
     capabilities: pm msi cap_list
     configuration: latency=0
     resources: memory:75280000-7529ffff

UNCLAIMED 可以理解为未激活的状态，另一种异常为 DISABLED

DISABLED

如果遇到 DISABLED 状态：

1	`ls /etc/NetworkManager/conf.d/`

1 2	`sudo touch /etc/NetworkManager/conf.d/10-globally-managed-devices.conf sudo systemctl restart NetworkManager`

问题解决！

UNCLAIMED

修改NetworkManager配置

1	`sudo vi /etc/NetworkManager/NetworkManager.conf`

将managed=false修改为managed=true，保存并退出

1
2
3

sudo service NetworkManager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
sudo service NetworkManager start

重启 Ubuntu ，问题解决。

解决后

重新查看 sudo lshw -c Network 命令：

*-network:1
     description: Ethernet interface
     product: Ethernet Connection (17) I219-LM
     vendor: Intel Corporation
     physical id: 1f.6
     bus info: pci@0000:00:1f.6
     logical name: enp0s31f6
     version: 11
     serial: 4c:d7:17:97:c2:7b
     size: 1Gbit/s
     capacity: 1Gbit/s
     width: 32 bits
     clock: 33MHz
     capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
     configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=6.5.0-28-generic duplex=full firmware=2.3-4 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
     resources: irq:145 memory:75280000-7529ffff