我使用的是 ubuntu 15.10，内核版本 4.2.0-25。我的笔记本电脑是戴尔 Inspiron 14-3452
问题是，一旦禁用蓝牙，就无法重新打开它。启用它的唯一方法是重新启动。
rfkill list
未显示软块或硬块
sudo hciconfig hci0 up
返回
Can't init device hci0: Connection timed out (110)
ifconfig 显示 hci0 蓝牙设备，但是当我输入 lsusb 时它没有显示任何蓝牙设备
$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0bda:5683 Realtek Semiconductor Corp.
Bus 001 Device 005: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 004: ID 0bda:b739 Realtek Semiconductor Corp.
Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 001 Device 006: ID 148f:5372 Ralink Technology, Corp. RT5372 Wireless Adapter
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
dmesg | grep Bluetooth 返回
dmesg | grep Bluetooth
[ 2.673842] usb 1-2.1: Product: Bluetooth Radio
[ 5.317495] Bluetooth: Core ver 2.20
[ 5.317534] Bluetooth: HCI device and connection manager initialized
[ 5.317541] Bluetooth: HCI socket layer initialized
[ 5.317548] Bluetooth: L2CAP socket layer initialized
[ 5.317558] Bluetooth: SCO socket layer initialized
[ 5.530006] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 5.530012] Bluetooth: BNEP filters: protocol multicast
[ 5.530020] Bluetooth: BNEP socket layer initialized
[ 5.673210] Bluetooth: hci0: rtl: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
[ 5.673218] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_fw.bin
[ 5.675249] Bluetooth: hci0: rom_version status=0 version=1
[ 8.617443] Bluetooth: RFCOMM TTY layer initialized
[ 8.617460] Bluetooth: RFCOMM socket layer initialized
[ 8.617474] Bluetooth: RFCOMM ver 1.11
[ 3627.862044] Bluetooth: hci0: rtl: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
[ 3627.862047] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_fw.bin
[ 3627.862911] Bluetooth: hci0: rom_version status=0 version=1
[ 6283.018539] Bluetooth: hci0 urb ffff880147d5c840 failed to resubmit (113)
[ 6360.048608] Bluetooth: hci0 urb ffff8801438f6900 failed to resubmit (113)
[ 7193.045144] Bluetooth: hci0 urb ffff880143bebc00 failed to resubmit (113)
[ 7596.035702] Bluetooth: hci0 urb ffff8801438c03c0 failed to resubmit (113)
我尝试过 rfkill 解除蓝牙封锁，编辑 /etc/rc.local，但都没有用。