蓝牙已打开，但无法找到或无法被任何其他设备找到。
的输出sudo service bluetooth status：
? bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since ??? 2015-06-04 22:33:18 GET; 13min ago
Main PID: 26678 (bluetoothd)
CGroup: /system.slice/bluetooth.service
??26678 /usr/sbin/bluetoothd -n
??? 04 22:39:14 Rangoo bluetoothd[26678]: Endpoint registered: sender=:1.63 path=/MediaEndpoint/BlueZ4/HFPAG
??? 04 22:39:14 Rangoo bluetoothd[26678]: Endpoint registered: sender=:1.63 path=/MediaEndpoint/BlueZ4/HFPHS
??? 04 22:39:14 Rangoo bluetoothd[26678]: Endpoint registered: sender=:1.63 path=/MediaEndpoint/BlueZ4/A2DPSource
??? 04 22:39:14 Rangoo bluetoothd[26678]: Endpoint registered: sender=:1.63 path=/MediaEndpoint/BlueZ4/A2DPSink
??? 04 22:39:14 Rangoo bluetoothd[26678]: bluetoothd[26678]: …我在 DELL XPS 13 笔记本电脑（型号 9343，bios A03）上安装了 Ubuntu 15.04。我的内部蓝牙设备被hci检测到，图标在任务栏中，但是在扫描蓝牙设备时它什么也没找到，也找不到它本身。我附上一些信息。欢迎提出建议。
cribari@darwin4:~$ uname -a; lspci -nnk | grep -iA2 net; lsusb; dmesg | grep -i bluetooth; dmesg | grep -i firmware; lsmod | grep bluetooth
Linux darwin4 3.19.0-15-generic #15-Ubuntu SMP Thu Apr 16 23:32:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
02:00.0 Network controller [0280]: Broadcom Corporation BCM4352 802.11ac Wireless Network Adapter [14e4:43b1] (rev 03)
Subsystem: Dell Device [1028:0019]
Kernel driver in use: wl
Bus 003 Device 002: ID 8087:8001 Intel Corp.
Bus …