路由器已配置192.168.1.1。插入以太网电缆后，我可以看到路由器的主页，并且所有互联网浏览均正常。
仅使用 wifi 时，与路由器主页的连接速度非常慢，并且对某些 API 和网站的访问也时断时续。浏览器/curl 可以解析路由器主页，但几乎没有连接。
route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 100 0 0 enx00e111002949
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlp2s0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlp2s0
192.168.1.0 0.0.0.0 255.255.255.0 U 100 0 0 enx00e111002949
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp2s0
uname -a
Linux xyz 5.4.0-42-generic #46~18.04.1-Ubuntu SMP Fri Jul 10 07:21:24 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
wifi 设备
02:00.0 Network controller: Intel Corporation Device 2723 (rev 1a)
并使用最新的驱动程序https://www.killernetworking.com/products/killer-ax1650/
编辑：
dmesg | grep iwl
[ 4.957222] Loading modules backported from iwlwifi
[ 4.957223] iwlwifi-stack-public:master:8324:9176b151
[ 5.260806] iwlwifi 0000:02:00.0: enabling device (0000 -> 0002)
[ 5.276799] iwlwifi 0000:02:00.0: Direct firmware load for iwl-dbg-cfg.ini failed with error -2
[ 5.278797] iwlwifi 0000:02:00.0: api flags index 2 larger than supported by driver
[ 5.278824] iwlwifi 0000:02:00.0: TLV_FW_FSEQ_VERSION: FSEQ Version: 89.3.35.22
[ 5.278830] iwlwifi 0000:02:00.0: Found debug destination: EXTERNAL_DRAM
[ 5.278833] iwlwifi 0000:02:00.0: Found debug configuration: 0
[ 5.279273] iwlwifi 0000:02:00.0: loaded firmware version 55.d9698065.0 cc-a0-55.ucode op_mode iwlmvm
[ 5.279514] iwlwifi 0000:02:00.0: Direct firmware load for iwl-debug-yoyo.bin failed with error -2
[ 5.437971] iwlwifi 0000:02:00.0: Detected Intel(R) Wi-Fi 6 AX200 160MHz, REV=0x340
[ 5.643259] iwlwifi 0000:02:00.0: base HW address: 04:ed:33:c0:5a:9e
[ 5.729155] iwlwifi 0000:02:00.0 wlp2s0: renamed from wlan0
modinfo iwlwifi
filename: /lib/modules/5.4.0-42-generic/updates/dkms/iwlwifi.ko
version: iwlwifi-stack-public:master:8324:9176b151
license: GPL
author: Copyright(c) 2003- 2015 Intel Corporation <[email protected]>
description: Intel(R) Wireless WiFi driver for Linux
firmware: iwlwifi-7265D-29.ucode
firmware: iwlwifi-7265-17.ucode
firmware: iwlwifi-3168-29.ucode
firmware: iwlwifi-3160-17.ucode
firmware: iwlwifi-7260-17.ucode
firmware: iwlwifi-8265-36.ucode
firmware: iwlwifi-8000C-36.ucode
firmware: iwlwifi-9260-th-b0-jf-b0-46.ucode
firmware: iwlwifi-9000-pu-b0-jf-b0-46.ucode
firmware: iwlwifi-SoSnj-a0-gf-a0-55.ucode
firmware: iwlwifi-SoSnj-a0-gf4-a0-55.ucode
firmware: iwlwifi-ty-a0-gf-a0-55.ucode
firmware: iwlwifi-so-a0-gf-a0-55.ucode
firmware: iwlwifi-so-a0-hr-b0-55.ucode
firmware: iwlwifi-so-a0-jf-b0-55.ucode
firmware: iwlwifi-cc-a0-55.ucode
firmware: iwlwifi-QuQnj-b0-jf-b0-55.ucode
firmware: iwlwifi-QuZ-a0-jf-b0-55.ucode
firmware: iwlwifi-QuZ-a0-hr-b0-55.ucode
firmware: iwlwifi-Qu-b0-jf-b0-55.ucode
firmware: iwlwifi-Qu-c0-hr-b0-55.ucode
firmware: iwlwifi-QuQnj-b0-hr-b0-55.ucode
firmware: iwlwifi-Qu-a0-jf-b0-55.ucode
firmware: iwlwifi-Qu-a0-hr-a0-55.ucode
...
depends: compat,cfg80211
retpoline: Y
name: iwlwifi
vermagic: 5.4.0-42-generic SMP mod_unload
signat: PKCS#7
signer:
sig_key:
sig_hashalgo: md4
parm: debug:debug output mask (uint)
parm: xvt_default_mode:xVT is the default operation mode (default: false) (bool)
parm: swcrypto:using crypto in software (default 0 [hardware]) (int)
parm: 11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX (uint)
parm: amsdu_size:amsdu size 0: 12K for multi Rx queue devices, 2K for AX210 devices, 4K for other devices 1:4K 2:8K 3:12K 4: 2K (default 0) (int)
parm: fw_restart:restart firmware in case of error (default true) (bool)
parm: antenna_coupling:specify antenna coupling in dB (default: 0 dB) (int)
parm: nvm_file:NVM file name (charp)
parm: uapsd_disable:disable U-APSD functionality bitmap 1: BSS 2: P2P Client (default: 3) (uint)
parm: enable_ini:Enable debug INI TLV FW debug infrastructure (default: true (bool)
parm: bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
parm: led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int)
parm: power_save:enable WiFi power management (default: disable) (bool)
parm: power_level:default power save level (range from 1 - 5, default: 1) (int)
parm: disable_11ac:Disable VHT capabilities (default: false) (bool)
parm: disable_11ax:Disable HE capabilities (default: false) (bool)
parm: disable_msix:Disable MSI-X and use MSI instead (default: false) (bool)
parm: remove_when_gone:Remove dev from PCIe bus if it is deemed inaccessible (default: false) (bool)
解决
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 127.0.0.53
当 wifi 通过网络共享连接到移动网络时，使用同一个 wifi 设备的所有活动都是正常的，这让我怀疑这与 wifi 驱动程序无关。
当通过以太网访问路由器 UI 时，或者其他macbook 运行良好，没有连接问题。
由于某种原因，只有在使用 wifi 时才会出现超时和网络停滞。页面连接后无法加载。通过工具 gcloud 等进行的 API 调用超时。
它在 Windows 上运行良好。
DNS 有问题吗？路由或其他可以调查的问题？
我该如何尝试找出根本原因？
答案1
切换回 5.3.0-62-generic，一切正常。似乎驱动程序在 5.4+ 内核版本上存在问题