我在一台 LG gram 电脑上运行着 Ubuntu 18.04.3 LTS，今天我决定关闭蓝牙以取消配对。现在我无法重新打开它。这台笔记本电脑最初配备的是 Windows 10，所以我确信我的笔记本电脑中的蓝牙卡有一些奇怪的东西，只能使用 Windows 10 操作系统才能打开。所以我花了几个小时寻找一个简单的解决方案，但我找不到一个简单的解决方案。我正在考虑去商店买一个加密狗。无论如何，我可以不这样做就解决这个问题吗？谢谢。
“lspci -knn | grep Net -A3; lsusb; dmesg | grep -i blue”的输出为：
3b:00.0 Network controller [0280]: Intel Corporation Wireless 8265 / 8275
[8086:24fd] (rev 78)
Subsystem: Intel Corporation Wireless 8265 / 8275 [8086:9010]
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 009: ID 10a5:0007
Bus 001 Device 008: ID 04f2:0939 Chicony Electronics Co., Ltd
Bus 001 Device 007: ID 0bda:562e Realtek Semiconductor Corp.
Bus 001 Device 002: ID 22b8:2e25 Motorola PCS
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[ 189.148139] Bluetooth: Core ver 2.22
[ 189.148165] Bluetooth: HCI device and connection manager initialized
[ 189.148168] Bluetooth: HCI socket layer initialized
[ 189.148171] Bluetooth: L2CAP socket layer initialized
[ 189.148179] Bluetooth: SCO socket layer initialized
[ 189.260478] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 189.260479] Bluetooth: BNEP filters: protocol multicast
[ 189.260481] Bluetooth: BNEP socket layer initialized
[ 189.266533] Bluetooth: hci0: BCM: chip id 73
[ 189.267500] Bluetooth: hci0: BCM: features 0x07
[ 189.283555] Bluetooth: hci0: BCM20702B
[ 189.284546] Bluetooth: hci0: BCM20702B0 (002.001.014) build 0000
[ 189.284743] bluetooth hci0: Direct firmware load for brcm/BCM20702B0-19ff-0239.hcd failed with error -2
[ 189.284745] Bluetooth: hci0: BCM: Patch brcm/BCM20702B0-19ff-0239.hcd not found
[ 189.342383] Bluetooth: RFCOMM TTY layer initialized
[ 189.342387] Bluetooth: RFCOMM socket layer initialized
[ 189.342397] Bluetooth: RFCOMM ver 1.11
[ 569.923718] Bluetooth: hci0: BCM: chip id 73
[ 569.924701] Bluetooth: hci0: BCM: features 0x07
[ 569.940651] Bluetooth: hci0: BCM20702B
[ 569.941564] Bluetooth: hci0: BCM20702B0 (002.001.014) build 0000
[ 569.941576] bluetooth hci0: Direct firmware load for brcm/BCM20702B0-19ff-0239.hcd failed with error -2
[ 569.941577] Bluetooth: hci0: BCM: Patch brcm/BCM20702B0-19ff-0239.hcd not found
我确实买了一个蓝牙适配器，它能用，但也许我们还能解决这个问题。谢谢。