藍牙被軟阻止，rfkill unblock 不起作用

藉口是我一直在尋找一個新的發行版並實時啟動幾個安裝媒體（Mint、Ubuntu、Debian），並且我的藍牙收音機停止工作。我的猜測是，在發行版中處理藍牙的方式存在一些細微差別，它進入了未指定的狀態。

任何發行版中的 GUI 控制項都無法再次打開它。每當我點擊它時，它立即移回關閉位置……沒有錯誤消息；它只是沒有用。

我以前也遇到過這種情況！ 我在兩台不同的電腦上發生過這種情況。第一次是幾年前；很久以前，我不記得我是如何修復它的！據我回憶，我只是在玩rfkill，然後突然它起作用了。

但是，令我煩惱的是，一段時間以來我一直無法解決這個問題——Google並沒有幫助我。我一直在嘗試使用 rfkill 解除阻止（或阻止然後解除阻止）藍牙，但什麼也沒發生。狀態始終為“軟阻止：是”。打開和關閉硬體飛行模式按鈕也無濟於事。以下是我嘗試的命令行：

root@lsb-hp6570b-deb:/home/jcxz100# rfkill list
0: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no
1: hp-wifi: Wireless LAN
   Soft blocked: no
   Hard blocked: no
2: hp-wwan: Wireless WAN
   Soft blocked: no
   Hard blocked: no
3: hp-gps: GPS
   Soft blocked: no
   Hard blocked: no
4: hp-bluetooth: Bluetooth
   Soft blocked: yes
   Hard blocked: no
root@lsb-hp6570b-deb:/home/jcxz100# rfkill unblock 4
root@lsb-hp6570b-deb:/home/jcxz100# rfkill list
0: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no
1: hp-wifi: Wireless LAN
   Soft blocked: no
   Hard blocked: no
2: hp-wwan: Wireless WAN
   Soft blocked: no
   Hard blocked: no
3: hp-gps: GPS
   Soft blocked: no
   Hard blocked: no
4: hp-bluetooth: Bluetooth
   Soft blocked: yes
   Hard blocked: no
root@lsb-hp6570b-deb:/home/jcxz100# rfkill block 4
root@lsb-hp6570b-deb:/home/jcxz100# rfkill list
0: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no
1: hp-wifi: Wireless LAN
   Soft blocked: no
   Hard blocked: no
2: hp-wwan: Wireless WAN
   Soft blocked: no
   Hard blocked: no
3: hp-gps: GPS
   Soft blocked: no
   Hard blocked: no
4: hp-bluetooth: Bluetooth
   Soft blocked: yes
   Hard blocked: no
root@lsb-hp6570b-deb:/home/jcxz100# rfkill unblock 4
root@lsb-hp6570b-deb:/home/jcxz100# rfkill list
0: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no
1: hp-wifi: Wireless LAN
   Soft blocked: no
   Hard blocked: no
2: hp-wwan: Wireless WAN
   Soft blocked: no
   Hard blocked: no
3: hp-gps: GPS
   Soft blocked: no
   Hard blocked: no
4: hp-bluetooth: Bluetooth
   Soft blocked: yes
   Hard blocked: no
root@lsb-hp6570b-deb:/home/jcxz100# rfkill block bluetooth
root@lsb-hp6570b-deb:/home/jcxz100# rfkill unblock bluetooth
root@lsb-hp6570b-deb:/home/jcxz100# rfkill list
0: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no
1: hp-wifi: Wireless LAN
   Soft blocked: no
   Hard blocked: no
2: hp-wwan: Wireless WAN
   Soft blocked: no
   Hard blocked: no
3: hp-gps: GPS
   Soft blocked: no
   Hard blocked: no
4: hp-bluetooth: Bluetooth
   Soft blocked: yes
   Hard blocked: no

我正在使用 Debian 9.9 並且我的 rfkill 版本是“0.5-1+b1 (Debian)”，但是由於我之前在舊電腦上的 Mint 16（或者可能是 17）上發生過這種情況，我不會詳細說明與我的規格。

請參閱下面我自己的解決方案。

就在今天晚上，我偶然發現了“解決方案”（我將其描述為針對 rfkill 命令中的一個特殊性（錯誤？）的解決方法）。

你必須使用這個命令：

rfkill unblock all

如上所示，僅解除藍牙阻塞是行不通的。

root@lsb-hp6570b-deb:/home/jcxz100# rfkill block all
root@lsb-hp6570b-deb:/home/jcxz100# rfkill list
0: phy0: Wireless LAN
   Soft blocked: yes
   Hard blocked: yes
1: hp-wifi: Wireless LAN
   Soft blocked: yes
   Hard blocked: no
2: hp-wwan: Wireless WAN
   Soft blocked: yes
   Hard blocked: no
3: hp-gps: GPS
   Soft blocked: yes
   Hard blocked: no
4: hp-bluetooth: Bluetooth
   Soft blocked: yes
   Hard blocked: no
root@lsb-hp6570b-deb:/home/jcxz100# rfkill unblock all
root@lsb-hp6570b-deb:/home/jcxz100# rfkill list
0: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no
1: hp-wifi: Wireless LAN
   Soft blocked: no
   Hard blocked: no
2: hp-wwan: Wireless WAN
   Soft blocked: no
   Hard blocked: no
3: hp-gps: GPS
   Soft blocked: no
   Hard blocked: no
4: hp-bluetooth: Bluetooth
   Soft blocked: no
   Hard blocked: no
5: hci0: Bluetooth
   Soft blocked: no
   Hard blocked: no

rfkill 似乎在列出時將藍牙無線電視為軟阻塞，但在被要求解除阻塞時卻沒有……因此什麼也沒做。但是當使用“all”目標時，它只是繼續並改變每個無線電的狀態，而不判斷它們是否已經被解除阻塞。

引用自：https://unix.stackexchange.com/questions/534819