我该如何排除内部断线故障？WiFi 几分钟后就会断线。问题出现前几天，我让与我签订了互联网合同的公司更换了一些互联网电缆。我联系了他们，但他们没有发现任何问题。可能是因为电脑吗？我使用的是 Ubuntu 20.04 LTS。
nmcli 设备 wifi 列表：
IN-USE BSSID SSID MODE CHAN RATE SIGNAL BARS SECURITY
DC:53:7C:99:94:D9 UPC22C7FAD Infra 1 130 Mbit/s 97 ▂▄▆█ WPA1 WPA2
* 6C:A4:D1:4F:DE:A0 DIGI_4fdea0 Infra 6 130 Mbit/s 75 ▂▄▆_ WPA2
DC:53:7C:99:94:FE UPC22C7FAD Infra 36 405 Mbit/s 72 ▂▄▆_ WPA1 WPA2
D4:B1:10:50:2C:E8 DIGI-hTdF Infra 10 130 Mbit/s 39 ▂▄__ WPA1 WPA2
EA:C3:2A:86:B9:67 -- Infra 8 195 Mbit/s 34 ▂▄__ WPA2
D8:32:14:F0:C8:01 Tenda_F0C800 Infra 2 270 Mbit/s 32 ▂▄__ WPA1 WPA2
E4:C3:2A:86:B9:67 TP-Link_B967 Infra 8 195 Mbit/s 32 ▂▄__ WPA1 WPA2
DC:F8:B9:D0:96:E9 DIGI_d096e9 Infra 3 130 Mbit/s 27 ▂___ WPA1 WPA2
34:2C:C4:38:93:56 Magic beauty salon 2 Infra 6 130 Mbit/s 27 ▂___ WPA1 WPA2
00:5F:67:15:69:34 TP-LINK_51E2_2.4GEXT Infra 11 130 Mbit/s 27 ▂___ WPA2
80:8C:97:75:71:01 DIGI-24-757101 Infra 1 130 Mbit/s 25 ▂___ WPA2
90:55:DE:04:9D:18 DIGI_049d18 Infra 1 270 Mbit/s 17 ▂___ WPA2
D4:B7:09:F9:B0:84 DIGI_f9b084 Infra 3 130 Mbit/s 17 ▂___ WPA1 WPA2
7C:8B:CA:A5:EE:0E NELIAN Infra 1 270 Mbit/s 14 ▂___ WPA2