这是联想 G580
一些命令的输出：
$ lsusb | grep "Bluetooth"
Bus 001 Device 033: ID 0cf3:3004 Atheros Communications, Inc. AR3012 Bluetooth 4.0
$ service bluetooth status
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset
Active: active (running) since Tue 2016-11-15 22:33:25 CET; 4 days ago
Docs: man:bluetoothd(8)
Main PID: 1291 (bluetoothd)
Status: "Running"
CGroup: /system.slice/bluetooth.service
└─1291 /usr/lib/bluetooth/bluetoothd
Nov 15 22:33:25 justanother-PC systemd[1]: Starting Bluetooth service...
Nov 15 22:33:25 justanother-PC bluetoothd[1291]: Bluetooth daemon 5.37
Nov 15 22:33:25 justanother-PC systemd[1]: Started Bluetooth service.
Nov 15 22:33:25 justanother-PC bluetoothd[1291]: Starting SDP server
Nov 15 22:33:25 justanother-PC bluetoothd[1291]: Bluetooth management interface
但在设置中我看到了这个
这台笔记本电脑上没有蓝牙开关按钮。只有一个功能快捷键Fn+ F5，可以切换到飞行模式，反之亦然。但这也没什么用。
如何修复？
更新
$ lspci -nnk | grep -iA2 net
02:00.0 Ethernet controller [0200]: Qualcomm Atheros AR8162 Fast Ethernet [1969:1090] (rev 10)
Subsystem: Lenovo AR8162 Fast Ethernet [17aa:3979]
Kernel driver in use: alx
Kernel modules: alx
03:00.0 Network controller [0280]: Qualcomm Atheros AR9485 Wireless Network Adapter [168c:0032] (rev 01)
Subsystem: Lenovo AR9485 Wireless Network Adapter [17aa:3218]
Kernel driver in use: ath9k
Kernel modules: ath9k