下午都。
昨天（10 月 11 日）午夜，我的筆記型電腦透過乙太網路線失去了與網路的連線。我仍然可以透過 wifi 連線。
我有第二台筆記型電腦，它可以同時啟動 Xubuntu 19.04 和 Windows 10。
我已經通過刪除自動 eth0 設定並重新配置來設法恢復以太網，但現在它也停止工作了（而且我無法恢復自動 eth0！）。
任何人都可以幫我解決這個問題嗎？
@heynnema：您要求的資訊。
dkms status
digimend, 8, 5.0.0-29-generic, x86_64: installed
digimend, 8, 5.0.0-31-generic, x86_64: installed
sudo lshw -C network
[sudo] password for bac:
*-network
description: Ethernet interface
product: RTL810xE PCI Express Fast Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:07:00.0
logical name: enp7s0
version: 07
serial: b0:5a:da:c9:aa:2a
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical
configuration: broadcast=yes driver=r8169 latency=0 multicast=yes
resources: irq:18 ioport:4000(size=256) memory:b4000000-b4000fff memory:b4800000-b4803fff
*-network
description: Wireless interface
product: Wireless 3165
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:0d:00.0
logical name: wlp13s0
version: 81
serial: 94:65:9c:b9:9a:ba
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.0.0-31-generic firmware=29.1044073957.0 ip=192.168.1.114 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:44 memory:b2000000-b2001fff
cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
cat /etc/netplan/*.yaml
cat: '/etc/netplan/*.yaml': No such file or directory
@heynnema：第二次運行 sudo lshw -C 網路：
*-network
description: Ethernet interface
product: RTL810xE PCI Express Fast Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:07:00.0
logical name: enp7s0
version: 07
serial: b0:5a:da:c9:aa:2a
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical
configuration: broadcast=yes driver=r8169 latency=0 multicast=yes
resources: irq:18 ioport:4000(size=256) memory:b4000000-b4000fff memory:b4800000-b4803fff
*-network
description: Wireless interface
product: Wireless 3165
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:0d:00.0
logical name: wlp13s0
version: 81
serial: 94:65:9c:b9:9a:ba
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.0.0-31-generic firmware=29.1044073957.0 latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:44 memory:b2000000-b2001fff
@heynnema：第三次魅力！
sudo lshw -C network
*-network
description: Ethernet interface
product: RTL810xE PCI Express Fast Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:07:00.0
logical name: enp7s0
version: 07
serial: b0:5a:da:c9:aa:2a
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical
configuration: broadcast=yes driver=r8169 latency=0 multicast=yes
resources: irq:18 ioport:4000(size=256) memory:b4000000-b4000fff memory:b4800000-b4803fff
*-network
description: Wireless interface
product: Wireless 3165
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:0d:00.0
logical name: wlp13s0
version: 81
serial: 94:65:9c:b9:9a:ba
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.0.0-31-generic firmware=29.1044073957.0 latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:43 memory:b2000000-b2001fff
但仍然沒有自動eth0。我如何知道我是否擁有 5 類或 6 類電纜？
@heynnema：這應該是最後一個：
sudo lshw -C network
*-network
description: Ethernet interface
product: RTL810xE PCI Express Fast Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:07:00.0
logical name: enp7s0
version: 07
serial: b0:5a:da:c9:aa:2a
size: 100Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 duplex=full firmware=rtl8106e-1_0.0.1 06/29/12 ip=192.168.1.195 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
resources: irq:18 ioport:4000(size=256) memory:b4000000-b4000fff memory:b4800000-b4803fff
*-network DISABLED
description: Wireless interface
product: Wireless 3165
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:0d:00.0
logical name: wlp13s0
version: 81
serial: 94:65:9c:b9:9a:ba
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.0.0-31-generic firmware=29.1044073957.0 latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:43 memory:b2000000-b2001fff
答案1
從評論...
使用該命令進行長時間的故障排除後sudo lshw -C network，看起來沒有電纜連接到計算機，或者電纜有缺陷（用戶沒有使用 5e 類或 6 類電纜），或者交換器/集線器/路由器/調製解調器未連接。
確定電腦確實看到了 enp7s0 乙太網路設備，而不是 eth0 設備。透過使用 enp7s0 建立新的 NetworkManager GUI 連接腳本，並使用核心 -29、-30 和 -31 進行測試，一切似乎再次正常運作。使用 eth0 的舊連接腳本已被刪除。
如果再次失敗，您需要啟動到 Ubuntu Live DVD/USB 並重新測試乙太網路介面。