潜水很久了，第一次发帖。我知道很多人也有类似的问题，我已经查看了所有问题，但还是无法解决我的问题。如果我的问题格式不正确，请原谅。
我在 Dell Latitude e5450 上全新安装了 Ubuntu 20.04。Wifi 工作正常，但有线以太网不工作。我还是个 Linux 业余爱好者，但我觉得这是驱动程序问题？
sudo lshw -C network
*-network UNCLAIMED
description: Ethernet controller
product: Ethernet Connection I218-LM
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
version: 03
width: 32 bits
clock: 33MHz
capabilities: pm msi cap_list
configuration: latency=0
resources: memory:f7200000-f721ffff memory:f7243000-f7243fff ioport:f080(size=32)
*-network
description: Wireless interface
product: QCA9565 / AR9565 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 01
serial: b0:c0:90:08:d5:cb
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=5.8.0-45-generic firmware=N/A ip=192.168.1.181 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:19 memory:f7000000-f707ffff memory:f7080000-f708ffff
sudo lspci -kv
00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I218-LM (rev 03)
DeviceName: Onboard LAN
Subsystem: Intel Corporation Ethernet Connection I218-LM
Flags: fast devsel, IRQ 20
Memory at f7200000 (32-bit, non-prefetchable) [size=128K]
Memory at f7243000 (32-bit, non-prefetchable) [size=4K]
I/O ports at f080 [size=32]
Capabilities: [c8] Power Management version 2
Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [e0] PCI Advanced Features
Kernel modules: e1000e
lspci -k | grep -i net
00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I218-LM (rev 03)
Subsystem: Intel Corporation Ethernet Connection I218-LM
02:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)
Subsystem: Dell QCA9565 / AR9565 Wireless Network Adapter
我认为这意味着硬件已被操作系统识别，但没有驱动程序告诉它如何工作？我尝试从这里但我对这个过程不太熟悉，当我遇到问题时，我真的不知道如何解决它们。任何帮助都将不胜感激。其他屏幕截图供参考：
uname -r
5.8.0-45-generic
ifconfig -a
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 389 bytes 37485 (37.4 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 389 bytes 37485 (37.4 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.181 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::c1f2:d872:2156:e6c5 prefixlen 64 scopeid 0x20<link>
ether b0:c0:90:08:d5:cb txqueuelen 1000 (Ethernet)
RX packets 21903 bytes 10778568 (10.7 MB)
RX errors 0 dropped 2500 overruns 0 frame 0
TX packets 6002 bytes 810128 (810.1 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ip addr
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
2: wlp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether b0:c0:90:08:d5:cb brd ff:ff:ff:ff:ff:ff
inet 192.168.1.181/24 brd 192.168.1.255 scope global dynamic noprefixroute wlp2s0
valid_lft 81437sec preferred_lft 81437sec
inet6 fe80::c1f2:d872:2156:e6c5/64 scope link noprefixroute
valid_lft forever preferred_lft forever
cat /etc/netplan/01-network-manager-all.yaml
cat /etc/netplan/01-network-manager-all.yaml
# Let NetworkManager manage all devices on this system
network:
version: 2
谢谢你！！！
编辑1：将文本直接粘贴到问题中，而不仅仅是截图。
EDIT2：添加了 sudo lspci -kv。非常有帮助这里。 谢谢！