我无法使以太网插座正常工作以允许我连接到互联网。Ubuntu 20.04.1 LTS。与同一调制解调器的 WIFI 连接正常运行。当我将电缆插入计算机的以太网端口时，调制解调器上的以太网指示灯变为绿色，因此问题似乎出在软件上，而不是硬件上。
命令sudo pppoeconf
返回以下错误
抱歉，我扫描了 2 个接口，但您的提供商的访问集中器没有响应。请检查您的网络和调制解调器电缆。扫描失败的另一个原因可能是正在运行另一个控制调制解调器的 pppoe 进程。
我检查过了，pppoe 已经安装好了
Package: pppoeconf
Status: install ok installed
我输入了 sudo poff dsl-provider 并且它说
/usr/bin/poff: No pppd is running. None stopped.
ip a
results in
enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 2c:d4:44:92:0a:7d brd ff:ff:ff:ff:ff:ff inet 193.987.1.235/24 scope global enp2s0 valid_lft forever preferred_lft forever inet6 fe80::2ed4:44ff:fe92:a7d/64 scope link valid_lft forever preferred_lft forever
我输入sudo lshw -C network; sudo iwlist scanning; cat /etc/network/interfaces; cat /etc/lsb-release; lspci -nn; lsusb; uname -a; dmesg | grep ound; dmesg | grep b43; iwconfig; sudo /etc/init.d/networking restart
&它返回
*-network
description: Wireless interface
product: Centrino Wireless-N 2230
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:01:00.0
logical name: wlp1s0
version: c4
serial: 84:a6:c8:1e:fb:2c
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.4.0-56-generic firmware=18.168.6.1 ip=192.168.1.4 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:30 memory:f1500000-f1501fff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: enp2s0
version: 07
serial: 2c:d4:44:92:0a:7d
size: 100Mbit/s
capacity: 1Gbit/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 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 duplex=full firmware=rtl8168e-3_0.0.4 03/27/12 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
resources: irq:18 ioport:3000(size=256) memory:f0404000-f0404fff memory:f0400000-f0403fff
enp2s0 Interface doesn't support scanning.
wlp1s0 Scan completed :
Cell 01 - Address: 40:9B:CD:97:A9:DC
Channel:6
Frequency:2.437 GHz (Channel 6)
Quality=64/70 Signal level=-46 dBm
Encryption key:on
ESSID:"Internet"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
18 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=000000011f539a15
Extra: Last beacon: 128ms ago
IE: Unknown: 0008496E7465726E6574
IE: Unknown: 010882848B961224486C
IE: Unknown: 030106
IE: Unknown: 2A0104
IE: Unknown: 32040C183060
IE: Unknown: 2D1A9C0117FFFF000000000000000000000000000000000000000000
IE: Unknown: 3D1606000000000000000000000000000000000000000000
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 7F080000000100000000
IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
IE: Unknown: 7F080000000100000000
IE: Unknown: 0706474220010D10
IE: Unknown: DDAD0050F204104A00011010440001021057000101103B00010310470010BC329E001DD811B28601409BCD97A9DC1021001852616C696E6B20546563686E6F6C6F67792C20436F72702E1023001C52616C696E6B20576972656C6573732041636365737320506F696E74102400065254323836301042000831323334353637381054000800060050F20400011011000A44534C2D33373832545410080002218C103C0001011049000600372A000120
IE: Unknown: DD07000C4300000000
Cell 02 - Address: D8:47:32:86:5B:F4
Channel:3
Frequency:2.422 GHz (Channel 3)
Quality=28/70 Signal level=-82 dBm
Encryption key:on
ESSID:"TP-Link_5BF4"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
18 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=00000179ff13e18d
Extra: Last beacon: 2424ms ago
IE: Unknown: 000C54502D4C696E6B5F35424634
IE: Unknown: 010882848B961224486C
IE: Unknown: 030103
IE: Unknown: 32040C183060
IE: Unknown: 33082001020304050607
IE: Unknown: 33082105060708090A0B
IE: Unknown: 050400010010
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: DD310050F204104A00011010440001021047001038833092309218839C77D84732865BC4103C0001011049000600372A000120
IE: Unknown: 2A0104
IE: Unknown: 2D1AEC1117FFFF000001000000000000000000000000000000000000
IE: Unknown: 3D1603000700000000000000000000000000000000000000
IE: Unknown: 4A0E14000A002C01C800140005001900
IE: Unknown: 7F080100000000000000
IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
IE: Unknown: DD07000C4300000000
Cell 03 - Address: 8C:59:73:A0:6E:A0
Channel:10
Frequency:2.457 GHz (Channel 10)
Quality=33/70 Signal level=-77 dBm
Encryption key:on
ESSID:"italk-6EA0"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
18 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=000001b7fef41dda
Extra: Last beacon: 1436ms ago
IE: Unknown: 000A6974616C6B2D36454130
IE: Unknown: 010882848B961224486C
IE: Unknown: 03010A
IE: Unknown: 2A0104
IE: Unknown: 32040C183060
IE: Unknown: 2D1AEC1117FFFF000001000000000000000000000000000000000000
IE: Unknown: 3D160A000600000000000000000000000000000000000000
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : TKIP CCMP
Authentication Suites (1) : PSK
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : TKIP CCMP
Authentication Suites (1) : PSK
IE: Unknown: 7F080000000100000000
IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
IE: Unknown: 4A0E14000A002C01C800140005001900
IE: Unknown: 7F080000000100000000
IE: Unknown: 0706474220010D10
IE: Unknown: DDB90050F204104A0001101044000102103B00010310470010BC329E001DD811B286018C5973A06EA01021001A5A7978656C20436F6D6D756E69636174696F6E7320436F72702E1023001E5A7958454C20496E7465726E65742053686172696E6720476174657761791024000C414D47313330322D543131431042000D533138324532393030373730391054000800060050F20400011011000C414D47313330322D5431314310080002200C103C0001011049000600372A000120
IE: Unknown: DD07000C4300000000
Cell 04 - Address: 80:20:DA:7C:EC:AE
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=28/70 Signal level=-82 dBm
Encryption key:on
ESSID:"TALKTALK7CECB1"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=000002359b086ea2
Extra: Last beacon: 992ms ago
IE: Unknown: 000E54414C4B54414C4B374345434231
IE: Unknown: 010882848B962430486C
IE: Unknown: 03010B
IE: Unknown: 0706474220010D14
IE: Unknown: 200100
IE: Unknown: 23020F00
IE: Unknown: 2A0104
IE: Unknown: 32040C121860
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 0B0502000D0000
IE: Unknown: 2D1AAD0117FFFFFF0000000000000080017800000000000000000000
IE: Unknown: 3D160B080400000000000000000000000000000000000000
IE: Unknown: 7F080400000000000040
IE: Unknown: DD9F0050F204104A0001101044000102103B00010310470010AA6C51D2F0061E7B5A48ABB31922723210210008536167656D636F6D10230010536167656D636F6D464153543533363410240007332E302D332E301042000F4E373139303938344E3030343138311054000800060050F204000110110015536167656D636F6D46415354353336342D4E373139100800022000103C0001031049000600372A000120
IE: Unknown: DD090010180202101C0000
IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
Cell 05 - Address: 10:06:45:56:6C:84
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=30/70 Signal level=-80 dBm
Encryption key:on
ESSID:"PLUSNET-CTJQN7"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=000002359d46edd4
Extra: Last beacon: 976ms ago
IE: Unknown: 000E504C55534E45542D43544A514E37
IE: Unknown: 010882848B962430486C
IE: Unknown: 03010B
IE: Unknown: 0706474220010D14
IE: Unknown: 2A0104
IE: Unknown: 2F0104
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 32040C121860
IE: Unknown: 2D1AFC181BFFFF000000000000000000000000000000000000000000
IE: Unknown: 3D160B080400000000000000000000000000000000000000
IE: Unknown: DD800050F204104A0001101044000102103B000103104700102E08E1B91EBF83CD8806250C14B473531021000842726F6164636F6D1023000842726F6164636F6D1024000631323334353610420004313233341054000800060050F20400011011000A42726F6164636F6D415010080002200C103C0001011049000600372A000120
IE: Unknown: DD090010180206F02C0000
IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
lo Interface doesn't support scanning.
# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.1 LTS"
00:00.0 Host bridge [0600]: Intel Corporation 2nd Generation Core Processor Family DRAM Controller [8086:0104] (rev 09)
00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09)
00:16.0 Communication controller [0780]: Intel Corporation 7 Series/C216 Chipset Family MEI Controller #1 [8086:1e3a] (rev 04)
00:1a.0 USB controller [0c03]: Intel Corporation 7 Series/C216 Chipset Family USB Enhanced Host Controller #2 [8086:1e2d] (rev 04)
00:1b.0 Audio device [0403]: Intel Corporation 7 Series/C216 Chipset Family High Definition Audio Controller [8086:1e20] (rev 04)
00:1c.0 PCI bridge [0604]: Intel Corporation 7 Series/C216 Chipset Family PCI Express Root Port 1 [8086:1e10] (rev c4)
00:1c.2 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 [8086:1e14] (rev c4)
00:1c.3 PCI bridge [0604]: Intel Corporation 7 Series/C216 Chipset Family PCI Express Root Port 4 [8086:1e16] (rev c4)
00:1d.0 USB controller [0c03]: Intel Corporation 7 Series/C216 Chipset Family USB Enhanced Host Controller #1 [8086:1e26] (rev 04)
00:1f.0 ISA bridge [0601]: Intel Corporation HM75 Express Chipset LPC Controller [8086:1e5d] (rev 04)
00:1f.2 SATA controller [0106]: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] [8086:1e03] (rev 04)
00:1f.3 SMBus [0c05]: Intel Corporation 7 Series/C216 Chipset Family SMBus Controller [8086:1e22] (rev 04)
01:00.0 Network controller [0280]: Intel Corporation Centrino Wireless-N 2230 [8086:0887] (rev c4)
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 07)
Bus 002 Device 005: ID 8087:07da Intel Corp.
Bus 002 Device 004: ID 174c:55aa ASMedia Technology Inc. Name: ASM1051E SATA 6Gb/s bridge, ASM1053E SATA 6Gb/s bridge, ASM1153 SATA 3Gb/s bridge, ASM1153E SATA 6Gb/s bridge
Bus 002 Device 003: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for Bluetooth
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 04f2:b302 Chicony Electronics Co., Ltd
Bus 001 Device 003: ID 0bda:0138 Realtek Semiconductor Corp. RTS5138 Card Reader Controller
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Linux Navaged 5.4.0-56-generic #62-Ubuntu SMP Mon Nov 23 19:20:19 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
[ 0.014494] No NUMA configuration found
[ 0.127263] core: PMU erratum BJ122, BV98, HSD29 worked around, HT is on
[ 0.192367] pnp: PnP ACPI: found 7 devices
[ 0.418914] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.04
[ 0.419185] hub 1-0:1.0: USB hub found
[ 0.438902] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.04
[ 0.439139] hub 2-0:1.0: USB hub found
[ 0.477994] ima: No TPM chip found, activating TPM-bypass!
[ 0.478006] ima: No architecture policies found
[ 0.512811] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 0.525735] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 0.690389] lpc_ich: Resource conflict(s) found affecting gpio_ich
[ 0.915546] usb 1-1: New USB device found, idVendor=8087, idProduct=0024, bcdDevice= 0.00
[ 0.915887] hub 1-1:1.0: USB hub found
[ 0.931549] usb 2-1: New USB device found, idVendor=8087, idProduct=0024, bcdDevice= 0.00
[ 0.931858] hub 2-1:1.0: USB hub found
[ 1.327598] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=0138, bcdDevice=38.82
[ 1.333315] usb 2-1.1: New USB device found, idVendor=045e, idProduct=0745, bcdDevice= 6.34
[ 1.569495] usb 2-1.3: New USB device found, idVendor=174c, idProduct=55aa, bcdDevice= 1.00
[ 1.613574] usb 1-1.3: New USB device found, idVendor=04f2, idProduct=b302, bcdDevice=17.14
[ 1.764073] usb 2-1.4: New USB device found, idVendor=8087, idProduct=07da, bcdDevice=78.69
[ 4.407993] lp: driver loaded but no devices found
[ 6.732106] uvcvideo: Found UVC 1.00 device FJ Camera (04f2:b302)
[ 6.901593] intel_rapl_common: Found RAPL domain package
[ 6.901596] intel_rapl_common: Found RAPL domain core
[ 6.901597] intel_rapl_common: Found RAPL domain uncore
[ 7.102570] snd_hda_intel 0000:00:1b.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[ 7.157161] input: HDA Intel PCH Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input15
[ 7.157256] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input16
[ 7.157354] input: HDA Intel PCH HDMI as /devices/pci0000:00/0000:00:1b.0/sound/card0/input17
enp2s0 no wireless extensions.
wlp1s0 IEEE 802.11 ESSID:"Internet"
Mode:Managed Frequency:2.437 GHz Access Point: 40:9B:CD:97:A9:DC
Bit Rate=39 Mb/s Tx-Power=16 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=58/70 Signal level=-52 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:1245 Missed beacon:0
lo no wireless extensions.
Restarting networking (via systemctl): networking.service.
networking
drivers
network-manager
答案1
从ip a输出中，您可以看到 Wlan 连接wlp1s0是通过 IPv4 而不是 IPv6 连接的。您enp2s0只需启用 IPv6。我假设您的路由器只使用 IPv4 作为本地网络，因此您必须在 ethnernet 连接上启用 IPv4 协议。它应该在任务栏中可见，您也可以在其中更改配置。
编辑
好的，我想这是同一个问题链接在这篇文章中。因此尝试用 检查设置是否正确，sudo cat /etc/NetworkManager/NetworkManager.conf并将行更改为managed=false。managed=true之后重新启动网络管理器sudo service network-manager restart。
只是为了比较，你应该看到一些东西像这样在网络选项卡中。由于我使用的是不同的 Ubuntu 发行版，因此无法直接测试它。
编辑：2
我发现也许可以解决问题，具体取决于您实际缺少什么。由于ip -a显示有线接口，我假设您的驱动程序正在运行。所以希望您只需要创建连接：尝试此操作
sudo cat /etc/NetworkManager/NetworkManager.conf并添加一个空行
auto eth0
iface etho inet dhcp
所以它应该看起来像这样：
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
auto eth0
iface etho inet dhcp
有了证明的信息，这应该会有所帮助。