当我从笔记本电脑（Lenovo X1 Carbon） ping 台式电脑时遇到了问题。
- 两台机器都运行 Ubuntu 22.04
- 两台机器都使用 wifi 连接
- 在我关闭笔记本电脑盖子（或点击“暂停”），然后重新打开盖子后，问题开始出现
一切起初都很顺利，我收到了回复：
PING 192.168.1.12 (192.168.1.12) 56(84) bytes of data.
64 bytes from 192.168.1.12: icmp_seq=1 ttl=64 time=7.53 ms
64 bytes from 192.168.1.12: icmp_seq=2 ttl=64 time=8.14 ms
然后，当我合上笔记本电脑的盖子，重新打开它并尝试再次 ping 时，我收到“目标主机无法访问”和“没有到主机的路由”错误：
PING 192.168.1.12 (192.168.1.12) 56(84) bytes of data.
From 192.168.1.14 icmp_seq=1 Destination Host Unreachable
ping: sendmsg: No route to host
打开盖子后，我可以毫无问题地 ping 网络上的其他机器（例如 Windows PC、电视等）。此时我也可以从台式机 ping 笔记本电脑（另一个方向）。当我像这样尝试从另一个方向 ping 时，它实际上解决了这个问题并且我的笔记本电脑随后可以再次 ping 我的桌面！
任何帮助都将不胜感激。我的最终目标是从我的笔记本电脑远程访问我的台式电脑。谢谢。
编辑1：
笔记本电脑挂起前的 tcpdump（192.168.1.14）：
jon@jon-thinkpad:~$ tcpdump -l -n -e -s0 -p -i wlp0s20f3 icmp or arp
17:27:36.154969 9c:3d:cf:3e:c1:8e > d0:ab:d5:ba:9c:da, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.14 tell 192.168.1.1, length 28
17:27:36.154989 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.14 is-at d0:ab:d5:ba:9c:da, length 28
17:28:03.297330 9c:3d:cf:3e:c1:8e > d0:ab:d5:ba:9c:da, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.14 tell 192.168.1.1, length 28
17:28:03.297349 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.14 is-at d0:ab:d5:ba:9c:da, length 28
17:28:38.418208 9c:3d:cf:3e:c1:8e > d0:ab:d5:ba:9c:da, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.14 tell 192.168.1.1, length 28
17:28:38.418226 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.14 is-at d0:ab:d5:ba:9c:da, length 28
17:28:42.722884 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.11 tell 192.168.1.1, length 46
17:28:42.731943 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.10 tell 192.168.1.1, length 46
17:28:42.731960 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.6 tell 192.168.1.1, length 46
17:28:42.731962 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.5 tell 192.168.1.1, length 46
17:28:42.731964 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.3 tell 192.168.1.1, length 46
17:28:42.731966 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.2 tell 192.168.1.1, length 46
17:28:42.731968 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.4 tell 192.168.1.1, length 46
17:28:42.731969 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.14 tell 192.168.1.1, length 46
17:28:42.731978 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.14 is-at d0:ab:d5:ba:9c:da, length 28
17:28:42.732012 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.8 tell 192.168.1.1, length 46
17:28:42.732036 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.9 tell 192.168.1.1, length 46
17:28:43.130766 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.7 tell 192.168.1.1, length 46
17:28:43.130782 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.12 tell 192.168.1.1, length 46
17:29:08.526129 9c:3d:cf:3e:c1:8e > d0:ab:d5:ba:9c:da, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.14 tell 192.168.1.1, length 28
17:29:08.526149 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.14 is-at d0:ab:d5:ba:9c:da, length 28
笔记本电脑挂起后的 tcpdump：
jon@jon-thinkpad:~$ tcpdump -l -n -e -s0 -p -i wlp0s20f3 icmp or arp
17:31:00.481016 9c:3d:cf:3e:c1:8e > d0:ab:d5:ba:9c:da, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.14 tell 192.168.1.1, length 28
17:31:00.481025 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.14 is-at d0:ab:d5:ba:9c:da, length 28
17:31:32.636526 9c:3d:cf:3e:c1:8e > d0:ab:d5:ba:9c:da, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.14 tell 192.168.1.1, length 28
17:31:32.636545 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.14 is-at d0:ab:d5:ba:9c:da, length 28
17:32:24.775888 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.1 tell 192.168.1.14, length 28
17:32:24.779337 9c:3d:cf:3e:c1:8e > d0:ab:d5:ba:9c:da, ethertype ARP (0x0806), length 42: Reply 192.168.1.1 is-at 9c:3d:cf:3e:c1:8e, length 28
17:32:32.426379 9c:3d:cf:3e:c1:8e > d0:ab:d5:ba:9c:da, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.14 tell 192.168.1.1, length 28
17:32:32.426401 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.14 is-at d0:ab:d5:ba:9c:da, length 28
17:33:22.375774 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.1 tell 192.168.1.14, length 28
17:33:22.380239 9c:3d:cf:3e:c1:8e > d0:ab:d5:ba:9c:da, ethertype ARP (0x0806), length 42: Reply 192.168.1.1 is-at 9c:3d:cf:3e:c1:8e, length 28
17:33:36.549545 9c:3d:cf:3e:c1:8e > d0:ab:d5:ba:9c:da, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.14 tell 192.168.1.1, length 28
17:33:36.549564 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.14 is-at d0:ab:d5:ba:9c:da, length 28
17:33:47.618338 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.11 tell 192.168.1.1, length 46
17:33:47.618354 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.3 tell 192.168.1.1, length 46
17:33:47.618357 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.2 tell 192.168.1.1, length 46
17:33:47.618358 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.14 tell 192.168.1.1, length 46
17:33:47.618367 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.14 is-at d0:ab:d5:ba:9c:da, length 28
17:33:47.618401 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.8 tell 192.168.1.1, length 46
17:33:47.618403 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.4 tell 192.168.1.1, length 46
17:33:47.618405 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.10 tell 192.168.1.1, length 46
17:33:47.618407 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.7 tell 192.168.1.1, length 46
17:33:47.618436 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.6 tell 192.168.1.1, length 46
17:33:47.618440 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.5 tell 192.168.1.1, length 46
17:33:47.620438 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.12 tell 192.168.1.1, length 46
17:33:47.620456 9c:3d:cf:3e:c1:8e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.1.9 tell 192.168.1.1, length 46
17:34:22.791964 d0:ab:d5:ba:9c:da > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.1 tell 192.168.1.14, length 28
17:34:22.795671 9c:3d:cf:3e:c1:8e > d0:ab:d5:ba:9c:da, ethertype ARP (0x0806), length 42: Reply 192.168.1.1 is-at 9c:3d:cf:3e:c1:8e, length 28
笔记本电脑挂起前后的 IP：
jon@jon-thinkpad:~$ ip -ts -4 monitor neigh
[2024-03-04T17:26:59.220897] 192.168.1.1 dev wlp0s20f3 lladdr 9c:3d:cf:3e:c1:8e STALE
[2024-03-04T17:27:10.228452] 192.168.1.1 dev wlp0s20f3 lladdr 9c:3d:cf:3e:c1:8e REACHABLE
[2024-03-04T17:28:20.116782] 192.168.1.1 dev wlp0s20f3 lladdr 9c:3d:cf:3e:c1:8e STALE
[2024-03-04T17:28:34.452806] 192.168.1.1 dev wlp0s20f3 lladdr 9c:3d:cf:3e:c1:8e REACHABLE
[2024-03-04T17:29:50.368581] Deleted 192.168.1.12 dev wlp0s20f3 lladdr 10:68:38:c9:0b:b3 STALE
[2024-03-04T17:29:50.368615] Deleted 224.0.0.251 dev wlp0s20f3 lladdr 01:00:5e:00:00:fb NOARP
[2024-03-04T17:29:50.368624] Deleted 224.0.0.22 dev wlp0s20f3 lladdr 01:00:5e:00:00:16 NOARP
[2024-03-04T17:29:50.368632] Deleted 192.168.1.1 dev wlp0s20f3 lladdr 9c:3d:cf:3e:c1:8e REACHABLE
[2024-03-04T17:29:50.518990] Deleted 224.0.0.251 dev wlp0s20f3 lladdr 01:00:5e:00:00:fb NOARP
[2024-03-04T17:29:50.650895] Deleted 224.0.0.22 dev wlp0s20f3 lladdr 01:00:5e:00:00:16 NOARP
[2024-03-04T17:30:25.362439] 192.168.1.1 dev wlp0s20f3 lladdr 9c:3d:cf:3e:c1:8e REACHABLE
[2024-03-04T17:31:09.000044] 192.168.1.1 dev wlp0s20f3 lladdr 9c:3d:cf:3e:c1:8e STALE
[2024-03-04T17:31:14.888019] 192.168.1.1 dev wlp0s20f3 lladdr 9c:3d:cf:3e:c1:8e REACHABLE
[2024-03-04T17:31:55.847955] 192.168.1.1 dev wlp0s20f3 lladdr 9c:3d:cf:3e:c1:8e STALE
挂起前的桌面 tcpdump（192.168.1.12）：
jon@jon-bmf2:~$ tcpdump -l -n -e -s0 -p -i wlp4s0 icmp or arp
17:27:55.549791 16:0d:59:3c:f0:f1 > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.5, length 28
17:27:55.549806 10:68:38:c9:0b:b3 > 16:0d:59:3c:f0:f1, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:27:59.690599 48:e7:da:2a:a6:01 > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 (10:68:38:c9:0b:b3) tell 192.168.1.3, length 28
17:27:59.690609 10:68:38:c9:0b:b3 > 48:e7:da:2a:a6:01, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:28:04.112583 9c:3d:cf:3e:c1:8e > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.1, length 28
17:28:04.112593 10:68:38:c9:0b:b3 > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:28:05.933158 6a:c3:74:27:91:3c > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.6, length 28
17:28:05.933174 10:68:38:c9:0b:b3 > 6a:c3:74:27:91:3c, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:28:22.022601 10:68:38:c9:0b:b3 > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.1 tell 192.168.1.12, length 28
17:28:22.025702 9c:3d:cf:3e:c1:8e > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Reply 192.168.1.1 is-at 9c:3d:cf:3e:c1:8e, length 28
17:28:26.524497 16:0d:59:3c:f0:f1 > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.5, length 28
17:28:26.524507 10:68:38:c9:0b:b3 > 16:0d:59:3c:f0:f1, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:28:29.198086 48:e7:da:2a:a6:01 > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 (10:68:38:c9:0b:b3) tell 192.168.1.3, length 28
17:28:29.198095 10:68:38:c9:0b:b3 > 48:e7:da:2a:a6:01, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:28:34.112901 9c:3d:cf:3e:c1:8e > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.1, length 28
17:28:34.112917 10:68:38:c9:0b:b3 > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:28:34.858630 6a:c3:74:27:91:3c > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.6, length 28
17:28:34.858640 10:68:38:c9:0b:b3 > 6a:c3:74:27:91:3c, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
挂起后的桌面 tcpdump：
jon@jon-bmf2:~$ tcpdump -l -n -e -s0 -p -i wlp4s0 icmp or arp
17:30:54.490666 16:0d:59:3c:f0:f1 > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.5, length 28
17:30:54.490681 10:68:38:c9:0b:b3 > 16:0d:59:3c:f0:f1, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:30:59.189303 48:e7:da:2a:a6:01 > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 (10:68:38:c9:0b:b3) tell 192.168.1.3, length 28
17:30:59.189317 10:68:38:c9:0b:b3 > 48:e7:da:2a:a6:01, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:31:02.022600 10:68:38:c9:0b:b3 > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.1 tell 192.168.1.12, length 28
17:31:02.026461 9c:3d:cf:3e:c1:8e > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Reply 192.168.1.1 is-at 9c:3d:cf:3e:c1:8e, length 28
17:31:06.921898 6a:c3:74:27:91:3c > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.6, length 28
17:31:06.921914 10:68:38:c9:0b:b3 > 6a:c3:74:27:91:3c, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:31:14.130287 9c:3d:cf:3e:c1:8e > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.1, length 28
17:31:14.130318 10:68:38:c9:0b:b3 > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:31:14.201418 16:0d:59:3c:f0:f1 > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.5, length 28
17:31:14.201429 10:68:38:c9:0b:b3 > 16:0d:59:3c:f0:f1, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:31:29.194457 48:e7:da:2a:a6:01 > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 (10:68:38:c9:0b:b3) tell 192.168.1.3, length 28
17:31:29.194473 10:68:38:c9:0b:b3 > 48:e7:da:2a:a6:01, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:31:35.850567 6a:c3:74:27:91:3c > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.6, length 28
17:31:35.850583 10:68:38:c9:0b:b3 > 6a:c3:74:27:91:3c, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:31:36.482380 16:0d:59:3c:f0:f1 > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.5, length 28
17:31:36.482395 10:68:38:c9:0b:b3 > 16:0d:59:3c:f0:f1, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
17:31:37.350589 10:68:38:c9:0b:b3 > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.1 tell 192.168.1.12, length 28
17:31:37.353640 9c:3d:cf:3e:c1:8e > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Reply 192.168.1.1 is-at 9c:3d:cf:3e:c1:8e, length 28
17:31:44.130345 9c:3d:cf:3e:c1:8e > 10:68:38:c9:0b:b3, ethertype ARP (0x0806), length 42: Request who-has 192.168.1.12 tell 192.168.1.1, length 28
17:31:44.130361 10:68:38:c9:0b:b3 > 9c:3d:cf:3e:c1:8e, ethertype ARP (0x0806), length 42: Reply 192.168.1.12 is-at 10:68:38:c9:0b:b3, length 28
暂停前后的桌面 IP：
jon@jon-bmf2:~$ ip -ts -4 monitor neigh
[2024-03-04T17:26:12.742378] 192.168.1.1 dev wlp4s0 lladdr 9c:3d:cf:3e:c1:8e STALE
[2024-03-04T17:26:21.958652] 192.168.1.1 dev wlp4s0 lladdr 9c:3d:cf:3e:c1:8e PROBE
[2024-03-04T17:26:21.961608] 192.168.1.1 dev wlp4s0 lladdr 9c:3d:cf:3e:c1:8e REACHABLE
[2024-03-04T17:26:45.510632] 192.168.1.1 dev wlp4s0 lladdr 9c:3d:cf:3e:c1:8e STALE
[2024-03-04T17:26:51.910669] 192.168.1.1 dev wlp4s0 lladdr 9c:3d:cf:3e:c1:8e PROBE
[2024-03-04T17:26:51.913847] 192.168.1.1 dev wlp4s0 lladdr 9c:3d:cf:3e:c1:8e REACHABLE
...
答案1
台式电脑有 MT7921 无线网卡。Ubuntu 今天提示我进行软件更新，其中包括MT7921 固件的变更。更新后，我不再能重现该问题。我可以 ping 和远程访问台式电脑，没有任何问题。我遇到的其他 wifi 间歇性问题也已得到解决。
我有点困惑为什么这能解决问题，为什么挂起/唤醒笔记本电脑会有所不同。但我会接受它！