我有戴尔 XPS 13 的新开发版，它附带 ubuntu 14.04 LTS。由于新 LTS 已经发布，我决定升级到 16.04，它应该支持 BLE（低功耗蓝牙）设备，例如 Microsoft Designer 键盘和鼠标。但我无法让它工作。
如果我尝试配对鼠标，则会失败：
~ bluetoothctl
[NEW] Controller 44:85:00:2C:E5:E7 laptop [default]
[bluetooth]# scan on
Discovery started
[CHG] Controller 44:85:00:2C:E5:E7 Discovering: yes
[NEW] Device E5:4B:7C:B0:25:13 Designer Mouse
[bluetooth]# pair E5:4B:7C:B0:25:13
Attempting to pair with E5:4B:7C:B0:25:13
[CHG] Device E5:4B:7C:B0:25:13 Connected: yes
[CHG] Device E5:4B:7C:B0:25:13 UUIDs: 00001800-0000-1000-8000-00805f9b34fb
[CHG] Device E5:4B:7C:B0:25:13 UUIDs: 00001801-0000-1000-8000-00805f9b34fb
[CHG] Device E5:4B:7C:B0:25:13 UUIDs: 0000180a-0000-1000-8000-00805f9b34fb
[CHG] Device E5:4B:7C:B0:25:13 UUIDs: 0000180f-0000-1000-8000-00805f9b34fb
[CHG] Device E5:4B:7C:B0:25:13 UUIDs: 00001812-0000-1000-8000-00805f9b34fb
[Designer Mouse]# connect E5:4B:7C:B0:25:13
Attempting to connect to E5:4B:7C:B0:25:13
Connection successful
[CHG] Device E5:4B:7C:B0:25:13 Connected: no
Failed to pair: org.bluez.Error.AuthenticationCanceled
在系统日志中可以找到更多日志：
May 19 18:05:11 laptop kernel: [29453.178205] Bluetooth: SMP security requested but not available
May 19 18:05:11 laptop bluetoothd[1154]: Unable to register GATT service with handle 0x0009 for device E5:4B:7C:B0:25:13
May 19 18:05:11 laptop bluetoothd[1154]: Unable to register GATT service with handle 0x000e for device E5:4B:7C:B0:25:13
May 19 18:05:12 laptop bluetoothd[1154]: Error reading PNP_ID value: Attribute requires authentication before read/write
May 19 18:05:13 laptop bluetoothd[1154]: Error reading Report value: Attribute requires authentication before read/write
May 19 18:05:13 laptop bluetoothd[1154]: message repeated 3 times: [ Error reading Report value: Attribute requires authentication before read/write]
May 19 18:05:14 laptop bluetoothd[1154]: Report Map read failed: Attribute requires authentication before read/write
May 19 18:05:14 laptop bluetoothd[1154]: Protocol Mode characteristic read failed: Attribute requires authentication before read/write
May 19 18:05:14 laptop bluetoothd[1154]: HID Information read failed: Attribute requires authentication before read/write
May 19 18:05:14 laptop bluetoothd[1154]: Read Report Reference descriptor failed: Attribute requires authentication before read/write
May 19 18:05:14 laptop bluetoothd[1154]: message repeated 3 times: [ Read Report Reference descriptor failed: Attribute requires authentication before read/write]
我想知道“SMP 安全...”这一行是否重要？我找到了这个链接，正确答案的作者描述了他如何“修补”自己的 hid 文件，但这样做并没有帮助：Ubuntu 14.04 LTS 上的 Microsoft Designer 鼠标（蓝牙 4.0）
尝试连接键盘时，结果和日志非常相似（只有地址发生变化），所以我在这里省略了它们。
希望有人能给我一些有用的提示吗？
提前致谢 ：）
答案1
我从 17.04 更新到了最新的 bluez 版本。根据 debian 错误单，它已修复。我只是手动下载了文件。