我尝试了找到的所有方法，但没有任何效果。
我尝试使用的连接是有线以太网，电缆连接到墙上的插座，再连接到 tp-link tl-sg108，后者从 TIM HUB+ ZTE H388X 获得连接。该系统与 Windows 10 是双启动的，在那里运行良好，虽然不确定这是否只是巧合，在 Ubuntu Steam 停止工作后我第一次切换回来时警告其服务未运行，我必须将其设置为在启动时自动加载。之后我回到了 Ubuntu，尝试了一堆修复，但都没有用，我恢复了更改，重新启动，它又恢复了工作，直到我切换回 Windows 并回到 Ubuntu，之后就再也没用了。每次我回到 Windows 时，时间都会调慢 2 小时，我需要禁用并重新启用自动时间，Ubuntu 可以自行管理，只是现在它没有连接，例如在 grep 中，syslog有些条目比一些较晚的条目早 2 小时，因为我注意到时间在晚上 11 点后的某个时间点不对。主板是华硕 Sabertooth Z87，因此网卡是 I217-V。在 Ubuntu 上，连接工作正常了几个星期，今天才开始不工作。
在路由器上我尝试过：
- 重新启动以便重置 DHCP 租约，以防租约仅在 Windows 上可用（如果在 Windows 上获得）
在 Windows 上：
- 禁用快速启动；
- 禁用局域网唤醒；
在 Ubuntu 上我尝试过：
- 通过设置为 true managed 来告诉 NetworkManager 管理所有连接
/etc/NetworkManager/NerworkManager.conf； - 在同一个文件中设置 dhcp 客户端，包括 internal、dhclient、dhcpcd；
- netplan 有一行告诉它让 NetworkManaged 进入它的东西
/etc/netplan/01-network-manager-all.yaml； - 重新启动 NetworkManages
sudo service NetworkManager restart和sudo systemctl restart NetworkManager - 在 创建一个空文件
/etc/NetworkManager/conf.d/10-globally-managed-devices.conf； - 手动设置IP、掩码、网关；
/var/lib/dhcp/dhclient.leases是空的;/var/lib/dhcpcd只有无线dhcp租约文件和secret文件；
通过运行，sudo dhcpcd -T eno1我有时看到它设法获取 IPv6，它实际上用它来连接，但只是说它已连接。Ping 没有得到回复，ping 后检查 arp 只显示<incomplete>在地址中，这意味着它没有得到任何回复。dhclient 也挂起了。
我还没有尝试过：这个人没有明确解释他做了什么在 19.04 中无法通过 DHCP 获取 IP，但如果使用 Windows，则可以获取
现在来看看常见的命令输出
sudo lshw -C network
*-network
description: Ethernet interface
product: Ethernet Connection I217-V
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
logical name: eno1
version: 04
serial: 74:d0:2b:2c:b0:a4
size: 1Gbit/s
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=5.15.0-37-generic duplex=full firmware=0.13-4 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
resources: irq:28 memory:ef300000-ef31ffff memory:ef339000-ef339fff ioport:f040(size=32)
*-network
description: Wireless interface
physical id: 9
bus info: usb@3:6
logical name: wlxc4e90a0658cc
serial: c4:e9:0a:06:58:cc
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rtl8xxxu driverversion=5.15.0-37-generic firmware=N/A ip=192.168.1.3 link=yes multicast=yes wireless=IEEE 802.11
systemctl status NetworkManager（我最后手动禁用了连接以免干扰 USB wifi）
● NetworkManager.service - Network Manager
Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2022-06-11 01:56:01 CEST; 13min ago
Docs: man:NetworkManager(8)
Main PID: 1001 (NetworkManager)
Tasks: 3 (limit: 38371)
Memory: 12.1M
CPU: 640ms
CGroup: /system.slice/NetworkManager.service
└─1001 /usr/sbin/NetworkManager --no-daemon
giu 11 02:04:03 Phantom NetworkManager[1001]: <info> [1654905843.1941] manager: NetworkManager state is now CONNECTED_LOCAL
giu 11 02:04:03 Phantom NetworkManager[1001]: <info> [1654905843.1944] device (wlxc4e90a0658cc): Activation: successful, device activated.
giu 11 02:04:05 Phantom NetworkManager[1001]: <info> [1654905845.5149] dhcp4 (wlxc4e90a0658cc): state changed new lease, address=192.168.1.3
giu 11 02:04:05 Phantom NetworkManager[1001]: <info> [1654905845.5155] manager: NetworkManager state is now CONNECTED_SITE
giu 11 02:04:05 Phantom NetworkManager[1001]: <info> [1654905845.5157] policy: set 'TIM-19358435' (wlxc4e90a0658cc) as default for IPv4 routing and DNS
giu 11 02:04:09 Phantom NetworkManager[1001]: <info> [1654905849.7524] manager: NetworkManager state is now CONNECTED_GLOBAL
giu 11 02:04:24 Phantom NetworkManager[1001]: <info> [1654905864.5081] device (eno1): state change: activated -> deactivating (reason 'user-requested', sys-iface-state: 'managed')
giu 11 02:04:24 Phantom NetworkManager[1001]: <info> [1654905864.5098] audit: op="device-disconnect" interface="eno1" ifindex=2 pid=2467 uid=1000 result="success"
giu 11 02:04:24 Phantom NetworkManager[1001]: <info> [1654905864.5220] device (eno1): state change: deactivating -> disconnected (reason 'user-requested', sys-iface-state: 'managed')
giu 11 02:04:24 Phantom NetworkManager[1001]: <info> [1654905864.5392] dhcp4 (eno1): canceled DHCP transaction
systemctl status dhcpcd
● dhcpcd.service - DHCP Client Daemon
Loaded: loaded (/lib/systemd/system/dhcpcd.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2022-06-11 01:56:00 CEST; 1h 13min ago
Docs: man:dhcpcd(8)
Process: 1002 ExecStart=/usr/sbin/dhcpcd (code=exited, status=0/SUCCESS)
Main PID: 1100 (dhcpcd)
Tasks: 1 (limit: 38371)
Memory: 1.5M
CPU: 324ms
CGroup: /system.slice/dhcpcd.service
└─1100 /usr/sbin/dhcpcd
giu 11 02:41:10 Phantom dhcpcd[1100]: eno1: Router Advertisement from fe80::9a00:6aff:fea6:7a30
giu 11 02:41:10 Phantom dhcpcd[1100]: wlxc4e90a0658cc: Router Advertisement from fe80::9a00:6aff:fea6:7a30
giu 11 02:47:02 Phantom dhcpcd[1100]: eno1: Router Advertisement from fe80::9a00:6aff:fea6:7a30
giu 11 02:47:02 Phantom dhcpcd[1100]: wlxc4e90a0658cc: Router Advertisement from fe80::9a00:6aff:fea6:7a30
giu 11 02:56:07 Phantom dhcpcd[1100]: eno1: Router Advertisement from fe80::9a00:6aff:fea6:7a30
giu 11 02:56:07 Phantom dhcpcd[1100]: wlxc4e90a0658cc: Router Advertisement from fe80::9a00:6aff:fea6:7a30
giu 11 03:01:27 Phantom dhcpcd[1100]: eno1: Router Advertisement from fe80::9a00:6aff:fea6:7a30
giu 11 03:01:27 Phantom dhcpcd[1100]: wlxc4e90a0658cc: Router Advertisement from fe80::9a00:6aff:fea6:7a30
giu 11 03:04:03 Phantom dhcpcd[1100]: eno1: Router Advertisement from fe80::9a00:6aff:fea6:7a30
giu 11 03:04:03 Phantom dhcpcd[1100]: wlxc4e90a0658cc: Router Advertisement from fe80::9a00:6aff:fea6:7a30
sudo lspci -nnk
00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection I217-V [8086:153b] (rev 04)
DeviceName: Onboard LAN
Subsystem: ASUSTeK Computer Inc. Ethernet Connection I217-V [1043:859f]
Kernel driver in use: e1000e
ip -6 neigh show
fe80::9a00:6aff:fea6:7a30 dev wlxc4e90a0658cc lladdr 98:00:6a:a6:7a:30 router STALE
fe80::9a00:6aff:fea6:7a30 dev eno1 lladdr 98:00:6a:a6:7a:30 router STALE
ip -4 neigh show
192.168.1.11 dev wlxc4e90a0658cc FAILED
192.168.1.1 dev wlxc4e90a0658cc lladdr 98:00:6a:a6:7a:30 REACHABLE
nmcli
wlxc4e90a0658cc: connected to TIM-19358435
"D-Link DWA-131 Nano"
wifi (rtl8xxxu), C4:E9:0A:06:58:CC, hw, mtu 1500
ip4 default
inet4 192.168.1.3/24
route4 192.168.1.0/24 metric 303
route4 default via 192.168.1.1 metric 303
route4 default via 192.168.1.1 metric 600
inet6 fe80::9990:2313:9f3a:28ce/64
inet6 fe80::29e5:3afd:ce7b:9742/64
route6 fe80::/64 metric 1024
route6 fe80::/64 metric 256
eno1: connected to Wired connection 1
"Intel I217-V"
ethernet (e1000e), 74:D0:2B:2C:B0:A4, hw, mtu 1500
inet6 fe80::48c6:f95d:829c:925d/64
route6 fe80::/64 metric 1024
lo: unmanaged
"lo"
loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536
DNS configuration:
servers: 192.168.1.1
domains: home
interface: wlxc4e90a0658cc
servers: fe80::9a00:6aff:fea6:7a30
interface: wlxc4e90a0658cc
Use "nmcli device show" to get complete information about known devices and
"nmcli connection show" to get an overview on active connection profiles.
Consult nmcli(1) and nmcli-examples(7) manual pages for complete usage details.
nmcli device show
GENERAL.DEVICE: wlxc4e90a0658cc
GENERAL.TYPE: wifi
GENERAL.HWADDR: C4:E9:0A:06:58:CC
GENERAL.MTU: 1500
GENERAL.STATE: 100 (connected)
GENERAL.CONNECTION: TIM-19358435
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/9
IP4.ADDRESS[1]: 192.168.1.3/24
IP4.GATEWAY: 192.168.1.1
IP4.ROUTE[1]: dst = 192.168.1.0/24, nh = 0.0.0.0, mt = 303
IP4.ROUTE[2]: dst = 0.0.0.0/0, nh = 192.168.1.1, mt = 303
IP4.ROUTE[3]: dst = 0.0.0.0/0, nh = 192.168.1.1, mt = 600
IP4.DNS[1]: 192.168.1.1
IP4.DOMAIN[1]: home
IP6.ADDRESS[1]: fe80::9990:2313:9f3a:28ce/64
IP6.ADDRESS[2]: fe80::29e5:3afd:ce7b:9742/64
IP6.GATEWAY: --
IP6.ROUTE[1]: dst = fe80::/64, nh = ::, mt = 1024
IP6.ROUTE[2]: dst = fe80::/64, nh = ::, mt = 256
IP6.DNS[1]: fe80::9a00:6aff:fea6:7a30
GENERAL.DEVICE: eno1
GENERAL.TYPE: ethernet
GENERAL.HWADDR: 74:D0:2B:2C:B0:A4
GENERAL.MTU: 1500
GENERAL.STATE: 100 (connected)
GENERAL.CONNECTION: Wired connection 1
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/13
WIRED-PROPERTIES.CARRIER: on
IP4.GATEWAY: --
IP6.ADDRESS[1]: fe80::48c6:f95d:829c:925d/64
IP6.GATEWAY: --
IP6.ROUTE[1]: dst = fe80::/64, nh = ::, mt = 1024
GENERAL.DEVICE: lo
GENERAL.TYPE: loopback
GENERAL.HWADDR: 00:00:00:00:00:00
GENERAL.MTU: 65536
GENERAL.STATE: 10 (unmanaged)
GENERAL.CONNECTION: --
GENERAL.CON-PATH: --
IP4.ADDRESS[1]: 127.0.0.1/8
IP4.GATEWAY: --
IP6.ADDRESS[1]: ::1/128
IP6.GATEWAY: --
IP6.ROUTE[1]: dst = ::1/128, nh = ::, mt = 256
nmcli con show
NAME UUID TYPE DEVICE
TIM-19358435 6c09dd30-1f42-40ae-a76a-24e0e9f43f0e wifi wlxc4e90a0658cc
Wired connection 1 ea97f513-3101-44a4-98a9-4cebaea410ae ethernet eno1
nmcli con show "Wired connection 1"
sudo dhcpcd -T eno1
DUID 00:04:41:9d:bf:20:d7:da:11:dd:ae:ff:74:d0:2b:2c:b0:a4
eno1: IAID 2b:2c:b0:a4
eno1: soliciting an IPv6 router
eno1: soliciting a DHCP lease
eno1: probing for an IPv4LL address
eno1: using IPv4LL address 169.254.230.155
interface='eno1'
pid='9102'
protocol='dhcp'
reason='TEST'
ifcarrier='up'
ifflags='4163'
ifmtu='1500'
ifwireless='0'
dhcpcd exited
arp -a -v
? (192.168.1.11) at <incomplete> on wlxc4e90a0658cc
H388X.home (192.168.1.1) at 98:00:6a:a6:7a:30 [ether] on wlxc4e90a0658cc
Entries: 2 Skipped: 0 Found: 2
sudo arpsend -D -e 192.168.1.1 eno1
arpsend: can't get iface 'eno1' address : Cannot assign requested address
ifconfig
eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::48c6:f95d:829c:925d prefixlen 64 scopeid 0x20<link>
ether 74:d0:2b:2c:b0:a4 txqueuelen 1000 (Ethernet)
RX packets 1221 bytes 128481 (128.4 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 874 bytes 146162 (146.1 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 20 memory 0xef300000-ef320000
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 22543 bytes 1701449 (1.7 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 22543 bytes 1701449 (1.7 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlxc4e90a0658cc: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.3 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::9990:2313:9f3a:28ce prefixlen 64 scopeid 0x20<link>
inet6 fe80::29e5:3afd:ce7b:9742 prefixlen 64 scopeid 0x20<link>
ether c4:e9:0a:06:58:cc txqueuelen 1000 (Ethernet)
RX packets 41887 bytes 32973913 (32.9 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 32570 bytes 6583725 (6.5 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ip addr show
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: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 74:d0:2b:2c:b0:a4 brd ff:ff:ff:ff:ff:ff
altname enp0s25
inet6 fe80::48c6:f95d:829c:925d/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: wlxc4e90a0658cc: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether c4:e9:0a:06:58:cc brd ff:ff:ff:ff:ff:ff
inet 192.168.1.3/24 brd 192.168.1.255 scope global dynamic noprefixroute wlxc4e90a0658cc
valid_lft 81932sec preferred_lft 81932sec
inet6 fe80::9990:2313:9f3a:28ce/64 scope link
valid_lft forever preferred_lft forever
inet6 fe80::29e5:3afd:ce7b:9742/64 scope link noprefixroute
valid_lft forever preferred_lft forever
ip r
default via 192.168.1.1 dev wlxc4e90a0658cc proto dhcp src 192.168.1.3 metric 303
default via 192.168.1.1 dev wlxc4e90a0658cc proto dhcp metric 600
192.168.1.0/24 dev wlxc4e90a0658cc proto dhcp scope link src 192.168.1.3 metric 303
route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default H388X.home 0.0.0.0 UG 303 0 0 wlxc4e90a0658cc
default H388X.home 0.0.0.0 UG 600 0 0 wlxc4e90a0658cc
192.168.1.0 0.0.0.0 255.255.255.0 U 303 0 0 wlxc4e90a0658cc
systemctl restart [email protected]
Failed to restart [email protected]: Unit [email protected] not found.
sudo systemctl restart [email protected]
Failed to restart [email protected]: Unit [email protected] not found.
cat /var/log/syslog | grep dhcp4