我有一台 Clevo N850HK1 笔记本电脑。
我刚刚（实际上并没有使用它）发现我无法启用/使用蓝牙。这是我尝试启用蓝牙时从蓝牙设置中得到的结果。
笔记本电脑没有任何蓝牙硬件开关。（我仔细检查了一下。）
为了帮助调试，这里有一些来自终端的更多信息：
$ lspci -nnk | grep -iA2 net
03:00.1 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 12)
Subsystem: CLEVO/KAPOK Computer RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [1558:850a]
Kernel driver in use: r8169
Kernel modules: r8169
04:00.0 Network controller [0280]: Intel Corporation Device [8086:24fd] (rev 78)
Subsystem: Intel Corporation Device [8086:1010]
Kernel driver in use: iwlwifi
$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 8087:0a2b Intel Corp.
Bus 001 Device 003: ID 04f2:b59e Chicony Electronics Co., Ltd
Bus 001 Device 002: ID 046d:c077 Logitech, Inc. M105 Optical Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
$ lsmod | grep blue
bluetooth 557056 14 btrtl,hci_uart,btintel,btqca,bnep,btbcm,btusb
$ rfkill list all
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
$ dmesg | egrep -i 'blue|firm'
[ 0.177482] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[ 1.689122] [drm] GuC firmware load skipped
[ 2.748370] Bluetooth: Core ver 2.21
[ 2.748380] Bluetooth: HCI device and connection manager initialized
[ 2.748382] Bluetooth: HCI socket layer initialized
[ 2.748383] Bluetooth: L2CAP socket layer initialized
[ 2.748386] Bluetooth: SCO socket layer initialized
[ 2.753562] Bluetooth: hci0: Bootloader revision 0.0 build 26 week 38 2015
[ 2.754643] Bluetooth: hci0: Device revision is 16
[ 2.754660] Bluetooth: hci0: Secure boot is enabled
[ 2.754660] Bluetooth: hci0: OTP lock is enabled
[ 2.754661] Bluetooth: hci0: API lock is enabled
[ 2.754661] Bluetooth: hci0: Debug lock is disabled
[ 2.754662] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 2.756845] bluetooth hci0: Direct firmware load for intel/ibt-12-16.sfi failed with error -2
[ 2.756847] Bluetooth: hci0: Failed to load Intel firmware file (-2)
[ 2.757664] Bluetooth: hci0: Bootloader revision 0.0 build 26 week 38 2015
[ 2.758691] Bluetooth: hci0: Device revision is 16
[ 2.758704] Bluetooth: hci0: Secure boot is enabled
[ 2.758704] Bluetooth: hci0: OTP lock is enabled
[ 2.758704] Bluetooth: hci0: API lock is enabled
[ 2.758704] Bluetooth: hci0: Debug lock is disabled
[ 2.758705] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 2.758710] bluetooth hci0: Direct firmware load for intel/ibt-12-16.sfi failed with error -2
[ 2.758711] Bluetooth: hci0: Failed to load Intel firmware file (-2)
[ 3.003906] Bluetooth: HCI UART driver ver 2.3
[ 3.003907] Bluetooth: HCI UART protocol H4 registered
[ 3.003907] Bluetooth: HCI UART protocol BCSP registered
[ 3.003908] Bluetooth: HCI UART protocol LL registered
[ 3.003908] Bluetooth: HCI UART protocol ATH3K registered
[ 3.003909] Bluetooth: HCI UART protocol Three-wire (H5) registered
[ 3.003925] Bluetooth: HCI UART protocol Intel registered
[ 3.003932] Bluetooth: HCI UART protocol BCM registered
[ 3.003932] Bluetooth: HCI UART protocol QCA registered
[ 3.003933] Bluetooth: HCI UART protocol AG6XX registered
[ 3.126669] Bluetooth: hci0: Bootloader revision 0.0 build 26 week 38 2015
[ 3.129488] Bluetooth: hci0: Device revision is 16
[ 3.129489] Bluetooth: hci0: Secure boot is enabled
[ 3.129489] Bluetooth: hci0: OTP lock is enabled
[ 3.129489] Bluetooth: hci0: API lock is enabled
[ 3.129490] Bluetooth: hci0: Debug lock is disabled
[ 3.129491] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 3.129515] bluetooth hci0: Direct firmware load for intel/ibt-12-16.sfi failed with error -2
[ 3.129516] Bluetooth: hci0: Failed to load Intel firmware file (-2)
[ 3.193592] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8265-24.ucode failed with error -2
[ 3.193601] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8265-23.ucode failed with error -2
[ 3.214247] iwlwifi 0000:04:00.0: loaded firmware version 22.361476.0 op_mode iwlmvm
[ 5.454217] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 5.454218] Bluetooth: BNEP filters: protocol multicast
[ 5.454220] Bluetooth: BNEP socket layer initialized
最后我的系统是完全升级的 Ubuntu 16.04.2
$ uname -r
4.8.0-41-generic
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial
关于如何启用蓝牙，您有什么想法吗？
答案1
您需要此设备的固件。可以按以下方式安装：
wget http://mirrors.kernel.org/ubuntu/pool/main/l/linux-firmware/linux-firmware_1.161.1_all.deb
sudo dpkg -i linux-firmware_1.161.1_all.deb
这将安装版本中的固件yakkety。xenial软件包尚未更新。