大家好，我遇到了一个挺头疼的无线网卡问题，想请各位帮忙分析下：

我用的是MacBook Air（版本7.2），装了Ubuntu 23.04。家里的路由器信号一直很好，但每次唤醒电脑连接WiFi时，时不时会被要求输入网络密码，有时候甚至要反复输好几次才能连上。连上之后，不管是查邮件还是打开Firefox浏览器，WiFi都可能突然断掉。重新选择网络连接，有时候能成功，有时候不行，甚至还会再次弹出密码输入框，折腾好几次才能稳定下来。

之前在Ubuntu 22.04里也有这个问题，感觉23.04稍微好一点，但还是没彻底解决。我怀疑是不是Broadcom网卡的驱动问题？知道系统工具文件夹里有日志查看器，但里面有4个日志文件，完全不知道该重点看什么，有点手足无措了。

下面是我收集的相关命令输出：

执行 sudo dmesg | grep wl 的结果： #

[    4.040518] wl: loading out-of-tree module taints kernel.
[    4.040539] wl: module license 'MIXED/Proprietary' taints kernel.
[    4.044551] wl: module verification failed: signature and/or required key missing - tainting kernel
[    4.185420] wlan0: Broadcom BCM43a0 802.11 Hybrid Wireless Controller 6.30.223.271 (r587334)
[    4.829818] wl 0000:03:00.0 wlp3s0: renamed from wlan0
[  102.210383] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[ 9860.650013] ERROR @wl_notify_scan_status :
[ 9860.650020] wlp3s0 Scan_results error (-22)
[ 9873.840173] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[12267.334289] ERROR @wl_notify_scan_status :
[12267.334293] wlp3s0 Scan_results error (-22)
[12277.491675] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[12484.036753] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[19550.153526] ERROR @wl_notify_scan_status :
[19550.153528] wlp3s0 Scan_results error (-22)
[19560.384033] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[19723.594961] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[26827.339099] ERROR @wl_notify_scan_status :
[26827.339102] wlp3s0 Scan_results error (-22)
[26837.113573] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[28064.870938] ERROR @wl_notify_scan_status :
[28064.870941] wlp3s0 Scan_results error (-22)
[28074.913482] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[28158.877043] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[28491.216848] ERROR @wl_notify_scan_status :
[28491.216851] wlp3s0 Scan_results error (-22)
[28501.112859] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[32788.083879] ERROR @wl_notify_scan_status :
[32788.083881] wlp3s0 Scan_results error (-22)
[32797.585768] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[33029.680743] ERROR @wl_notify_scan_status :
[33029.680748] wlp3s0 Scan_results error (-22)
[33057.620050] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready

执行 lspci -nnk | grep 0280 -A3 的结果： #

03:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM4360 802.11ac Wireless Network Adapter [14e4:43a0] (rev 03)
Subsystem: Apple Inc. BCM4360 802.11ac Wireless Network Adapter [106b:0117]
Kernel driver in use: wl
Kernel modules: bcma, wl

执行 nmcli device wifi list 的结果： #

IN-USE  BSSID              SSID             MODE   CHAN  RATE        SIGNAL  BA>
xx:xx:xx:EA:29:0E  CXNK001D2761     Infra  1     130 Mbit/s  72      ▂▄>
xx:xx:xx:EA:29:15  CXNK001D2761     Infra  108   540 Mbit/s  50      ▂▄

另外补充个后续情况：最近系统更新后，这个断连的问题好像自动解决了——从8月1号开始就没再出现过断连情况了。

备注：内容来源于stack exchange，提问作者tom koehler