升级/重装Linux后板载RTL8111以太网控制器未被识别，无法联网的求助

大家好，我刚用Ubuntu 22.04的Live DVD完成了系统全新安装——之前把硬盘分区全删除后重新部署的系统，但现在板载以太网完全无法使用，只有USB tethering能正常联网。我跑了几个排查命令，结果如下：

首先是路由表查询命令：

$ sudo netstat -rn

Kernel IP routing table

Destination
Gateway
Genmask
Flags
MSS Window
irtt
Iface

尝试ping网关的结果：

$ ping 192.168.1.1
ping: connect: Network is unreachable

用lshw检测网络设备：

$ sudo lshw -C Network
*-network UNCLAIMED
description: Ethernet controller
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci00000:03:00.0
version: 03
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress nsix vpd cap_list
configuration: latency=0
resources: ioport:ce00(size=256) memory: fdfff000-fdffffff memory: fdff800e-fdffbfff memory: fd600000-fd61ffff

接着查看网络接口信息：

david@david-linux:~$ sudo 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
valid_lft forever preferred_lft forever

再次检测网络设备：

david@david-linux:~$ sudo lshw -C network
[sudo] password for david:
*-network UNCLAIMED
description: Ethernet controller
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
version: 03
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd cap_list
configuration: latency=0
resources: ioport:ce00(size=256) memory:fdfff000-fdffffff memory:fdff8000-fdffbfff memory:fd600000-fd61ffff

能看到网卡一直显示UNCLAIMED，明显是系统没加载对应的驱动。有没有大佬能指点下怎么让系统识别这个RTL8111板载网卡呀？

备注：内容来源于stack exchange，提问作者DavidDJ40