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如果你在Ubuntu 18.04操作系统中有蓝牙鼠标连接失败问题，那就参考下面的解决方法处理。
解决方法 首先在系统终端下输入： bluetoothctl 然后输入： list 看清除 Controller 的 mac 地址，我的是 AC:2B:6E:91:65:4E，在终端输入： select AC:2B:6E:91:65:4E 然后输入： show 此时确保你的鼠标配对已打开，处于可被发现状态，输入： scan on 在输出信息中找到你的鼠标后，即可输入： scan off 并记下你鼠标的mac地址，如果你的鼠标连接时要求 pin code，则输入以下命令，若不用则跳过这一条（当然不确定的话需不需要 pin code 就执行一下，也没什么影响的）。 agent on 接下来使用上一条记下的鼠标mac地址，输入： pair DC:2C:26:AE:35:41 出现 Pairing successful，即配对成功，中间要求 pin code, 就输入对应 pin code即可。这时配对成功，但是鼠标还不能操作，依次输入： connect DC:2C:26:AE:35:41 trust DC:2C:26:AE:35:41 鼠标即可正常使用了。
参考：Bluetooth Mouse Won't Connect after Reboot - Ubuntu 18.04 LTS device: Bluetooth Mouse M336/M337/M535 problem: mouse won't pair after restarting computer resolution: I have also included them below along with the additional steps I needed to perform. // open up a command prompt and use the bluetoothctl command // list the available bluetooth controllers # bluetoothctl [bluetooth]# list Controller 01:23:45:67:89:AB fzidpc73 // choose the controller to work with [bluetooth]# select 01:23:45:67:89:AB // show/display the controller details bluetooth]# show Controller 01:23:45:67:89:AB Name: fzidpc73 Alias: fzidpc73-0 Class: 0x000000 Powered: no Discoverable: no Pairable: yes UUID: PnP Information (00001200-0000-1000-8000-00805f9b34fb) UUID: Generic Access Profile (00001800-0000-1000-8000-00805f9b34fb) UUID: Generic Attribute Profile (00001801-0000-1000-8000-00805f9b34fb) UUID: A/V Remote Control (0000110e-0000-1000-8000-00805f9b34fb) UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb) Modalias: usb:v1D6Bp0246d0517 Discovering: no [bluetooth]# power on [CHG] Controller 01:23:45:67:89:AB Class: 0x000104 Changing power on succeeded [CHG] Controller 01:23:45:67:89:AB Powered: yes // scan for bluetooth devices (make sure your mouse is in discovery mode before running this command) [bluetooth]# scan on Discovery started [CHG] Controller 01:23:45:67:89:AB Discovering: yes [NEW] Device 34:88:5D:87:C0:A6 Bluetooth Mouse M336/M337/M535 [bluetooth]# scan off Discovery stopped [CHG] Controller 01:23:45:67:89:AB Discovering: no // turn the agent on just incase you need to supply a pin code[bluetooth]# agent on Agent registered // note that the device might not ask you for a pin code [bluetooth]# pair 34:88:5D:87:C0:A6 Attempting to pair with 34:88:5D:87:C0:A6 [CHG] Device 34:88:5D:87:C0:A6 Connected: yes Request PIN code [agent] Enter PIN code: 1234 [CHG] Device 34:88:5D:87:C0:A6 UUIDs: 00001101-0000-1000-8000-00805f9b34fb [CHG] Device 34:88:5D:87:C0:A6 Paired: yes Pairing successful [CHG] Device 34:88:5D:87:C0:A6 Connected: no // once you have done this use the following two commands to // complete setup [bluetooth]# connect 34:88:5D:87:C0:A6 ... [bluetooth]# trust 34:88:5D:87:C0:A6 ... // your mouse should now work properly even after the computer has been restarted.
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