蓝牙无法连接到设备，即使它可以识别它们

Question

我在戴尔 xps 13 上运行 15.04，当我尝试添加设备时，蓝牙会识别设备，但不会让我连接到它们这是我的终端的结果。

~ $ uname -a; lspci -nnk | grep -iA2 net; lsusb; dmesg | grep -i bluetooth; dmesg | grep -i firmware; lsmod | grep bluetooth

Linux aaron-XPS-13 3.19.0-15-generic #15-Ubuntu SMP Thu Apr 16 23:32:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
02:00.0 Network controller [0280]: Broadcom Corporation BCM4352 802.11ac Wireless Network Adapter [14e4:43b1] (rev 03)
    Subsystem: Dell Device [1028:0019]
    Kernel driver in use: wl
Bus 003 Device 002: ID 8087:8001 Intel Corp. 
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0bda:5682 Realtek Semiconductor Corp. 
Bus 001 Device 002: ID 0a5c:216f Broadcom Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[    8.164048] Bluetooth: Core ver 2.20
[    8.164065] Bluetooth: HCI device and connection manager initialized
[    8.164069] Bluetooth: HCI socket layer initialized
[    8.164073] Bluetooth: L2CAP socket layer initialized
[    8.164079] Bluetooth: SCO socket layer initialized
[    8.353160] bluetooth hci0: Direct firmware load for brcm/BCM20702A0-0a5c-216f.hcd failed with error -2
[    8.353166] Bluetooth: hci0: BCM: patch brcm/BCM20702A0-0a5c-216f.hcd not found
[   20.289452] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   20.289455] Bluetooth: BNEP filters: protocol multicast
[   20.289459] Bluetooth: BNEP socket layer initialized
[   20.310897] Bluetooth: RFCOMM TTY layer initialized
[   20.310907] Bluetooth: RFCOMM socket layer initialized
[   20.310912] Bluetooth: RFCOMM ver 1.11
[  886.399085] Bluetooth: hci0 urb ffff8800d8c15e40 failed to resubmit (2)
[  895.471190] Bluetooth: hci0: BCM: patching hci_ver=06 hci_rev=1000 lmp_ver=06 lmp_subver=220e
[  896.113983] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=1624 lmp_ver=06 lmp_subver=220e
[    8.353160] bluetooth hci0: Direct firmware load for brcm/BCM20702A0-0a5c-216f.hcd failed with error -2
[  896.113983] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=1624 lmp_ver=06 lmp_subver=220e
bluetooth             491520  22 bnep,btusb,rfcomm
~ $ 

Answer 1

对于想知道Jeremy31 的回答中文件来源是什么的任何人，这里有另一种方法。

从 Microsoft 下载 Windows 驱动程序到/tmp.

http://catalog.update.microsoft.com/v7/site/ScopedViewRedirect.aspx?updateid=87a7756f-1451-45da-ba8a-55f8aa29dfee

使用cabextract以下方法解压：

cabextract 20662520_6c535fbfa9dca0d07ab069e8918896086e2af0a7.cab

下载并构建hex2hcd：

git clone https://github.com/jessesung/hex2hcd.git
pushd hex2hcd
make
popd

使.hcd.

./hex2hcd/hex2hcd BCM20702A1_001.002.014.1443.1572.hex BCM20702A0-0a5c-216f.hcd

将其移动到您的固件文件夹：

sudo cp BCM20702A0-0a5c-216f.hcd /lib/firmware/brcm/

并重新加载模块：

sudo modprobe -r btusb
sudo modprobe btusb

参考：

• https://ftbeowulf.wordpress.com/2015/06/23/dell-xps-13-9343-developer-edition-bluetooth-firmware/
• http://tech.sybreon.com/2015/03/15/xps13-9343-ubuntu-linux/

Answer 2

wget "https://dl.dropboxusercontent.com/s/r2pb41rhx65t9zi/BCM20702A0-0a5c-216f.hcd"
sudo cp BCM20702A0-0a5c-216f.hcd /lib/firmware/brcm/
sudo modprobe -r btusb
sudo modprobe btusb

^{有关 hcd 文件的来源，请参阅@Ian 的回答}

看看它是否有效

对于内核为 4.2+ 的 Ubuntu 15.10+ 和 14.04，第二个命令应该是

sudo cp BCM20702A0-0a5c-216f.hcd /lib/firmware/brcm/BCM.hcd

Answer 3

如果您使用的是XPS 13 9350 (2016 edition)，之前的答案将不起作用，因为您需要最新的驱动程序。

以下应该使您的蓝牙正常工作（在内核为 4.6.0-1-amd64 的 Debian Stretch 上测试）：

$ wget http://downloads.dell.com/FOLDER03272920M/1/9350_Network_Driver_XMJK7_WN32_12.0.1.720_A00.EXE
$ 7z x 9350_Network_Driver_XMJK7_WN32_12.0.1.720_A00.EXE
$ cp Win32/BCM4350C5_003.006.007.0095.1703.hex ./
$ hex2hcd BCM4350C5_003.006.007.0095.1703.hex
$ sudo mv BCM4350C5_003.006.007.0095.1703.hcd /lib/firmware/brcm/BCM-0a5c-6412.hcd

然后重新启动计算机并享受！

来源：https : //wiki.archlinux.org/index.php/Dell_XPS_13_(2015)#Bluetooth