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Ubuntu 16.04 无法激活蓝牙/停止工作

tag-icon • tag-icon upgrade bluetooth
Ubuntu 16.04 无法激活蓝牙/停止工作

我一直使用蓝牙，直到最近它停止工作，也就是说，我无法再通过系统设置中的界面激活它。我有一段时间没用它了，所以不确定是什么原因，可能是升级。

以下是一些输出：

$ sudo service bluetooth status
● bluetooth.service - Bluetooth service  
   Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
   Active: active (running) since Mon 2018-08-06 10:32:32 +07; 31min ago
     Docs: man:bluetoothd(8)
 Main PID: 19395 (bluetoothd)
   Status: "Running"
   CGroup: /system.slice/bluetooth.service   
           └─19395 /usr/lib/bluetooth/bluetoothd

 systemd[1]: Starting Bluetooth service...
 bluetoothd[19395]: Bluetooth daemon 5.37
 systemd[1]: Started Bluetooth service.
 bluetoothd[19395]: Starting SDP server
 bluetoothd[19395]: Bluetooth management interface 1.14 initialized
$ dmesg | grep Blue
[  548.821596] Bluetooth: Core ver 2.22
[  548.821618] Bluetooth: HCI device and connection manager initialized
[  548.821622] Bluetooth: HCI socket layer initialized
[  548.821625] Bluetooth: L2CAP socket layer initialized
[  548.821629] Bluetooth: SCO socket layer initialized
[  637.237929] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[  637.237930] Bluetooth: BNEP filters: protocol multicast
[  637.237933] Bluetooth: BNEP socket layer initialized

///

$ lsusb
Bus 001 Device 002: ID 8087:8000 Intel Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 0424:5534 Standard Microsystems Corp. Hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 006: ID 04f2:b3ed Chicony Electronics Co., Ltd 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

///

$ uname -a
Linux gs-HP-EliteBook-840-G1 4.15.0-29-generic #31~16.04.1-Ubuntu SMP Wed Jul 18 08:54:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

知道如何才能将它找回吗？

还添加以下输出：

$ rfkill list
0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

///

$ lsmod | grep bluetooth
bluetooth             557056  7 bnep
ecdh_generic           24576  1 bluetooth

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