我最近在我的戴尔 xps 15 上安装了 Ubuntu 18，令我惊讶的是，wifi 运行正常，但我无法连接有线以太网。
lshw 的输出是：
sudo lshw -C network
*-network
description: Wireless interface
product: QCA6174 802.11ac Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 32
serial: 9c:b6:d0:fc:1f:33
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath10k_pci driverversion=4.15.0-38-generic firmware=WLAN.RM.4.4.1-00079-QCARMSWPZ-1 ip=10.168.85.54 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:144 memory:ed200000-ed3fffff
*-network
description: Ethernet interface
physical id: 2
logical name: enx34298f9231a4
serial: 34:29:8f:92:31:a4
size: 1Gbit/s
capacity: 1Gbit/s
capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8152 driverversion=v1.09.9 duplex=full link=yes multicast=yes port=MII speed=1Gbit/s
所以我认为问题在于以太网接口没有找到产品！
由于戴尔 XPS 15 没有以太网端口，因此我使用 USB C 适配器。该适配器是一个 10 合 1 集线器（https://www.amazon.com/gp/product/B07GDHD3VC/ref=s9_acsd_hps_bw_c_x_1_w）并且 lsusb -v 的输出发布在这里https://paste.ubuntu.com/p/TNnF7FSYby/
更多诊断：
> lsmod | grep r8152
r8152 61440 0
mii 16384 2 usbnet,r8152
> ifconfig
enx34298f9231a4: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether 34:29:8f:92:31:a4 txqueuelen 1000 (Ethernet)
RX packets 63 bytes 11158 (11.1 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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 19788 bytes 37449974 (37.4 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 19788 bytes 37449974 (37.4 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.169.130.213 netmask 255.255.248.0 broadcast 10.169.135.255
inet6 fe80::539a:877a:c301:4d3f prefixlen 64 scopeid 0x20<link>
ether 9c:b6:d0:fc:1f:33 txqueuelen 1000 (Ethernet)
RX packets 1913953 bytes 2450518697 (2.4 GB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1090058 bytes 119134130 (119.1 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
> dmesg | grep enx34298f9231a4
[ 8.784167] r8152 4-1.3.1:1.0 enx34298f9231a4: renamed from eth0
[ 10.103739] IPv6: ADDRCONF(NETDEV_UP): enx34298f9231a4: link is not ready
[ 10.109374] IPv6: ADDRCONF(NETDEV_UP): enx34298f9231a4: link is not ready
[ 12.310544] r8152 4-1.3.1:1.0 enx34298f9231a4: carrier on
[ 12.310558] IPv6: ADDRCONF(NETDEV_CHANGE): enx34298f9231a4: link becomes ready
[ 6455.709355] r8152 4-1.3.1:1.0 enx34298f9231a4: carrier off
[11793.133656] r8152 4-1.3.1:1.0 enx34298f9231a4: Stop submitting intr, status -71
[11836.892211] r8152 4-1.3.1:1.0 enx34298f9231a4: renamed from eth0
[11836.933975] IPv6: ADDRCONF(NETDEV_UP): enx34298f9231a4: link is not ready
[11836.938515] IPv6: ADDRCONF(NETDEV_UP): enx34298f9231a4: link is not ready
[11840.292564] r8152 4-1.3.1:1.0 enx34298f9231a4: carrier on
[11840.292591] IPv6: ADDRCONF(NETDEV_CHANGE): enx34298f9231a4: link becomes ready
谢谢你！