bluetoothd在“设置安全简单配对”失败

从笔记本电脑的睡眠中醒来后，我的bluetoothd记录了系统日志中的故障：

 Jun 25 12:54:34 lati bluetoothd[718]: Adapter /org/bluez/718/hci0 has been disabled Jun 25 12:54:34 lati bluetoothd[718]: Unregister path: /org/bluez/718/hci0 Jun 25 12:54:34 lati bluetoothd[718]: Endpoint unregistered: sender=:1.59 path=/MediaEndpoint/A2DPSink Jun 25 12:54:34 lati bluetoothd[718]: Endpoint unregistered: sender=:1.59 path=/MediaEndpoint/A2DPSource Jun 25 12:54:34 lati bluetoothd[718]: Endpoint unregistered: sender=:1.59 path=/MediaEndpoint/HFPAG Jun 25 12:54:34 lati bluetoothd[718]: Endpoint unregistered: sender=:1.59 path=/MediaEndpoint/HFPHS Jun 25 12:54:34 lati bluetoothd[718]: Adapter /org/bluez/718/hci0 has been enabled Jun 25 12:54:34 lati bluetoothd[718]: Endpoint registered: sender=:1.59 path=/MediaEndpoint/HFPAG Jun 25 12:54:34 lati bluetoothd[718]: Endpoint registered: sender=:1.59 path=/MediaEndpoint/HFPHS Jun 25 12:54:34 lati bluetoothd[718]: Endpoint registered: sender=:1.59 path=/MediaEndpoint/A2DPSource Jun 25 12:54:34 lati bluetoothd[718]: Endpoint registered: sender=:1.59 path=/MediaEndpoint/A2DPSink Jun 25 12:54:34 lati bluetoothd[718]: Unknown command complete for opcode 19 Jun 25 12:54:34 lati bluetoothd[718]: hci0: Set Secure Simple Pairing (0x000b) failed: Busy (0x0a) 

我的系统信息：

• Ubuntu 14.04.4 LTS（可靠）
• 架构：64位
• 内核版本：3.16.0-40-generic
• 戴尔E7440
• Bios版本：A14
• 蓝牙：hci0：英特尔蓝牙固件文件：intel / ibt-hw-37.7.10-fw-1.80.2.3.d.bseq