我运行的是 12.04 版，WiFi 一直没问题，直到昨晚我安装了更新（更新很多，我不知道如何查看安装了哪些）。这可能无关紧要，但这是唯一发生变化的东西。
我无法再连接到我的家庭 WiFi 网络。有些网络（例如我的 Android 热点）工作正常，但连接到我们的 BT Home Hub 时会超时并提示进行身份验证。
该笔记本电脑是 HP EliteBook 8470p，配有“Centrino Advanced-N 6205”卡（在 lshw 中报告，我不确定它是否是另一张卡的品牌名称）。
以下是我的系统日志中的内容，错误似乎是‘无法为 AP 插入虚拟 STA 条目’：
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: get_secret_flags: assertion `is_secret_prop (setting, secret_name, error)' failed
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> (wlan0): device state change: need-auth -> prepare (reason 'none') [60 40 0]
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0/wireless): connection 'BTHub3-8ZRT 1' has security, and secrets exist. No new secrets needed.
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Config: added 'ssid' value 'BTHub3-8ZRT'
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Config: added 'scan_ssid' value '1'
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Config: added 'key_mgmt' value 'NONE'
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Config: added 'wep_key0' value '<omitted>'
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Config: added 'wep_tx_keyidx' value '0'
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Config: set interface ap_scan to 1
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> (wlan0): supplicant interface state: disconnected -> scanning
Sep 17 16:56:47 richard-HP-EliteBook-8470p wpa_supplicant[1506]: Trying to authenticate with 00:fe:f4:75:56:50 (SSID='BTHub3-8ZRT' freq=2412 MHz)
Sep 17 16:56:47 richard-HP-EliteBook-8470p wpa_supplicant[1506]: CTRL-EVENT-DISCONNECTED bssid=00:fe:f4:75:56:50 reason=2
Sep 17 16:56:47 richard-HP-EliteBook-8470p kernel: [ 291.593766] wlan0: deauthenticating from 00:fe:f4:75:56:50 by local choice (reason=2)
Sep 17 16:56:47 richard-HP-EliteBook-8470p NetworkManager[998]: <info> (wlan0): supplicant interface state: scanning -> authenticating
Sep 17 16:56:47 richard-HP-EliteBook-8470p wpa_supplicant[1506]: Trying to associate with 00:fe:f4:75:56:50 (SSID='BTHub3-8ZRT' freq=2412 MHz)
Sep 17 16:56:47 richard-HP-EliteBook-8470p wpa_supplicant[1506]: Association request to the driver failed
Sep 17 16:56:47 richard-HP-EliteBook-8470p kernel: [ 291.595197] wlan0: authenticate with 00:fe:f4:75:56:50 (try 1)
Sep 17 16:56:47 richard-HP-EliteBook-8470p kernel: [ 291.597584] wlan0: authenticated
Sep 17 16:56:47 richard-HP-EliteBook-8470p kernel: [ 291.597763] wlan0: failed to insert Dummy STA entry for the AP (error -17)
Sep 17 16:56:47 richard-HP-EliteBook-8470p NetworkManager[998]: <info> (wlan0): supplicant interface state: authenticating -> associating
有人知道问题可能是什么吗，以及如何解决它？
非常感谢您的帮助！
答案1
尝试这个
http://www.iasptk.com/ubuntu/19593-ubuntu-1204-wifi-not-working-at-laptop-or-notebook-unblock-it
Ubuntu 12.04。WiFi 不工作
检查 wifi 卡是否被阻止（终端）
rfkill list wlan (for wifi)
或者
rfkill list all (for wifi and bluetooth)
解除封锁：
rfkill unblock wlan (for wifi)
或者
rfkill unblock all (for wifi and bluetooth)
重启网络：
sudo service network-manager restart
答案2
实际上，我按照 2 步在我的电脑上启用无线功能
步骤 1：删除 bcmwl-kernel-source 包
sudo apt-get remove bcmwl-kernel-source
第 2 步：安装 firmware-b43-installer 包。
sudo apt-get install firmware-b43-installer
然后重新启动了我的 PC。
终于完成了我的工作。:)