我全新安装了 Ubuntu 20.04，并安装了所有更新和 Intel AX200，似乎开箱即用。据我所知，从内核 5.1 开始，此设备应该可以开箱即用，我使用的是 5.4，它可以工作，但我无法连接到任何网络 - 我输入了正确的密码，然后提示在超时后返回。
我尝试了家里的 WiFi，它适用于我的另一台电脑、几台笔记本电脑（都是 Linux）和几部手机。为了进行完整性检查，我还尝试从手机创建 WiFi 热点，但连接时遇到同样的问题。
以下是一些输出。
uname -sr
Linux 5.4.0-31-generic
lspci -knn（相关部分）
2d:00.0 Network controller [0280]: Intel Corporation Wi-Fi 6 AX200 [8086:2723] (rev 1a)
DeviceName: RTL8111EPV
Subsystem: Intel Corporation Wi-Fi 6 AX200 [8086:0084]
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
dmesg尝试连接后
[ 109.535290] wlo1: authenticate with 90:5c:44:ef:12:8c
[ 109.538454] wlo1: send auth to 90:5c:44:ef:12:8c (try 1/3)
[ 109.562154] wlo1: authenticated
[ 109.565795] wlo1: associate with 90:5c:44:ef:12:8c (try 1/3)
[ 109.571286] wlo1: RX AssocResp from 90:5c:44:ef:12:8c (capab=0x1511 status=17 aid=8774)
[ 109.571289] wlo1: 90:5c:44:ef:12:8c denied association (code=17)
[ 109.707690] wlo1: authenticate with 90:5c:44:ef:12:60
[ 109.709675] wlo1: send auth to 90:5c:44:ef:12:60 (try 1/3)
[ 110.323973] iwlwifi 0000:2d:00.0: No beacon heard and the time event is over already...
[ 110.324007] wlo1: Connection to AP 90:5c:44:ef:12:60 lost
[ 110.741987] wlo1: send auth to 90:5c:44:ef:12:60 (try 2/3)
[ 111.356240] iwlwifi 0000:2d:00.0: No beacon heard and the time event is over already...
[ 111.356328] wlo1: Connection to AP 90:5c:44:ef:12:60 lost
[ 111.510070] wlo1: send auth to 90:5c:44:ef:12:60 (try 3/3)
[ 112.124315] iwlwifi 0000:2d:00.0: No beacon heard and the time event is over already...
[ 112.124402] wlo1: Connection to AP 90:5c:44:ef:12:60 lost
[ 112.501653] wlo1: authentication with 90:5c:44:ef:12:60 timed out
[ 113.167325] wlo1: authenticate with 90:5c:44:ef:12:8c
[ 113.169701] wlo1: send auth to 90:5c:44:ef:12:8c (try 1/3)
[ 113.193272] wlo1: authenticated
[ 113.193622] wlo1: associate with 90:5c:44:ef:12:8c (try 1/3)
[ 113.199120] wlo1: RX AssocResp from 90:5c:44:ef:12:8c (capab=0x1511 status=17 aid=9240)
[ 113.199122] wlo1: 90:5c:44:ef:12:8c denied association (code=17)
[ 114.246064] wlo1: authenticate with 90:5c:44:ef:12:8c
[ 114.249091] wlo1: send auth to 90:5c:44:ef:12:8c (try 1/3)
[ 114.272630] wlo1: authenticated
[ 114.273601] wlo1: associate with 90:5c:44:ef:12:8c (try 1/3)
[ 114.279087] wlo1: RX AssocResp from 90:5c:44:ef:12:8c (capab=0x1511 status=17 aid=0)
[ 114.279090] wlo1: 90:5c:44:ef:12:8c denied association (code=17)
[ 124.939349] wlo1: authenticate with 90:5c:44:ef:12:60
[ 124.942238] wlo1: send auth to 90:5c:44:ef:12:60 (try 1/3)
[ 125.556483] iwlwifi 0000:2d:00.0: No beacon heard and the time event is over already...
[ 125.556692] wlo1: Connection to AP 90:5c:44:ef:12:60 lost
[ 125.685931] wlo1: send auth to 90:5c:44:ef:12:60 (try 2/3)
[ 126.300210] iwlwifi 0000:2d:00.0: No beacon heard and the time event is over already...
[ 126.300254] wlo1: Connection to AP 90:5c:44:ef:12:60 lost
[ 126.518729] wlo1: send auth to 90:5c:44:ef:12:60 (try 3/3)
[ 127.132869] iwlwifi 0000:2d:00.0: No beacon heard and the time event is over already...
[ 127.132929] wlo1: Connection to AP 90:5c:44:ef:12:60 lost
[ 127.509891] wlo1: authentication with 90:5c:44:ef:12:60 timed out
社区知道这里可能出了什么问题吗？我能做些什么来纠正它？
答案1
因此，我通过将路由器上的 2.4 Ghz 通道限制为 20 Mhz 来解决这个问题。
我还查看了网络管理器日志，并将它们与上面发布的 dmesg 进行了比较，似乎一切正常，但信号太弱，它可以在有限的信道宽度下工作，尽管它比我附近的其他电脑慢 10-20 倍，而且我仍然无法连接到我的手机。
然后我想到信号弱，并注意到我有一个未连接的外部天线（这是一台新电脑）。连接天线后，它工作正常，所以这不是那么棘手，只是我过度思考一个简单的问题 :)