bluetoothd falha em “configurar emparelhamento simples seguro”

Question

Meu bluetoothd registra uma falha no syslog depois de acordar de um sono do meu laptop:

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)

As informações do meu sistema:

• Ubuntu 14.04.4 LTS (fiel)
• Arquitetura: 64 bits
• Versão do Kernel: 3.16.0-40-generic
• Dell E7440
• Versão do BIOS: A14
• Bluetooth: hci0: arquivo de firmware Intel Bluetooth: intel / ibt-hw-37.7.10-fw-1.80.2.3.d.bseq