我正在尝试找出蓝牙搜索不起作用的原因。我已按照本教程步骤操作这里但dmesg没有给我“无法加载固件，可能无法正常工作”之类的消息
注意：wifi 运行良好，但在 google 中搜索 258a:1005 时显示的是 wifi 问题而不是蓝牙问题。
您对如何修复蓝牙有什么想法吗？
lsb_release -a
LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch:core-4.1-amd64:core-4.1-noarch:security-4.0-amd64:security-4.0-noarch:security-4.1-amd64:security-4.1-noarch
Distributor ID: Ubuntu
Description: Ubuntu 14.04.3 LTS
Release: 14.04
Codename: trusty
hciconfig
hci0: Type: BR/EDR Bus: USB
BD Address: 4C:BB:58:AA:A6:11 ACL MTU: 820:8 SCO MTU: 255:16
UP RUNNING PSCAN
RX bytes:1293 acl:0 sco:0 events:87 errors:0
TX bytes:1196 acl:0 sco:0 commands:84 errors:0
lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 004: ID 04f2:b49f Chicony Electronics Co., Ltd
Bus 002 Device 003: ID 174f:1169 Syntek
Bus 002 Device 002: ID 258a:1005
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
dmesg
[ 21.015877] usb 2-4: Product: Bluetooth Radio
[ 21.017463] usb 2-4: Manufacturer: Realtek
[ 21.019029] usb 2-4: SerialNumber: 00e04c000001
[ 28.055881] Bluetooth: Core ver 2.19
[ 28.058540] NET: Registered protocol family 31
[ 28.058546] Bluetooth: HCI device and connection manager initialized
[ 28.058560] Bluetooth: HCI socket layer initialized
[ 28.058564] Bluetooth: L2CAP socket layer initialized
[ 28.058582] Bluetooth: SCO socket layer initialized
[ 30.836430] Bluetooth: RFCOMM TTY layer initialized
[ 30.836445] Bluetooth: RFCOMM socket layer initialized
[ 30.836454] Bluetooth: RFCOMM ver 1.11
[ 31.227794] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 31.227799] Bluetooth: BNEP filters: protocol multicast
[ 31.227809] Bluetooth: BNEP socket layer initialized
[ 32.852383] r8169 0000:03:00.0 eth0: link down