藍牙在 debian 10 中不起作用

在我的筆記型電腦中，我使用了 debian 9，藍牙執行良好。我已將 debian 更新到 10 版本，之後藍牙無法正常工作。我不太擅長linux。你能幫助我嗎？

lspci -nnk | grep -iA3 net; lsusb; dmesg | egrep -i 'blue|firm'


00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection I218-LM [8086:155a] (rev 04)
Subsystem: Lenovo ThinkPad X240 [17aa:2214]
Kernel driver in use: e1000e
Kernel modules: e1000e

03:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b2] (rev 83)
Subsystem: Intel Corporation Dual Band Wireless-AC 7260 [8086:c270]
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
Bus 001 Device 002: ID 8087:8000 Intel Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 0480:b200 Toshiba America Inc 
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 005: ID 04f2:b39a Chicony Electronics Co., Ltd 
Bus 002 Device 004: ID 8087:07dc Intel Corp. 
Bus 002 Device 003: ID 138a:0017 Validity Sensors, Inc. VFS 5011 fingerprint sensor
Bus 002 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[    0.143041] [Firmware Bug]: TSC_DEADLINE disabled due to Errata; please update microcode to version: 0x20 (or later)
[    0.679313] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[    0.746791] pnp 00:01: [Firmware Bug]: PNP resource [mem 0xfed10000-0xfed13fff] covers only part of 0000:00:00.0 Intel MCH; extending to [mem 0xfed10000-0xfed17fff]
[    4.629289] psmouse serio2: trackpoint: IBM TrackPoint firmware: 0x0e, buttons: 3/3
[    5.749212] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked
[    5.974064] Bluetooth: Core ver 2.22
[    5.974081] Bluetooth: HCI device and connection manager initialized
[    5.974085] Bluetooth: HCI socket layer initialized
[    5.974087] Bluetooth: L2CAP socket layer initialized
[    5.974097] Bluetooth: SCO socket layer initialized
[    6.062386] Bluetooth: hci0: read Intel version: 370710018002030d00
[    6.062552] bluetooth hci0: firmware: failed to load intel/ibt-hw-37.7.10-fw-1.80.2.3.d.bseq (-2)
[    6.062553] firmware_class: See https://wiki.debian.org/Firmware for information about missing firmware
[    6.062555] bluetooth hci0: Direct firmware load for intel/ibt-hw-37.7.10-fw-1.80.2.3.d.bseq failed with error -2
[    6.062557] Bluetooth: hci0: failed to open Intel firmware file: intel/ibt-hw-37.7.10-fw-1.80.2.3.d.bseq (-2)
[    6.062564] bluetooth hci0: firmware: failed to load intel/ibt-hw-37.7.bseq (-2)
[    6.062566] bluetooth hci0: Direct firmware load for intel/ibt-hw-37.7.bseq failed with error -2
[    6.062567] Bluetooth: hci0: failed to open default fw file: intel/ibt-hw-37.7.bseq
[    6.134781] iwlwifi 0000:03:00.0: firmware: direct-loading firmware iwlwifi-7260-17.ucode
[    6.135135] iwlwifi 0000:03:00.0: loaded firmware version 17.459231.0 op_mode iwlmvm
[    6.843623] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    6.843624] Bluetooth: BNEP filters: protocol multicast
[    6.843628] Bluetooth: BNEP socket layer initialized
[   57.223136] Bluetooth: RFCOMM TTY layer initialized
[   57.223142] Bluetooth: RFCOMM socket layer initialized
[   57.223150] Bluetooth: RFCOMM ver 1.11

日誌消息表明系統正在尋找英特爾藍牙 ( ibt) 韌體文件，首先在/lib/firmware/intel/ibt-hw-37.7.10-fw-1.80.2.3.d.bseq，然後在/lib/firmware/intel/ibt-hw-37.7.bseq，但沒有找到韌體文件的任何一個版本。

轉到intellinux-firmware git tree 的子目錄，在其中找到正確的韌體文件，然後點擊文件名行末尾的“plain”進行下載。然後將文件放入您的/lib/firmware/intel目錄，然後重新啟動（或解除安裝並重新載入適當的核心模組）。此方法適用於所有 Linux 發行版，也適用於發行版尚未打包的韌體。

或者，確保您啟用了 Debian 軟體包儲存庫的非免費部分（如有必要，請參閱 ServerFault 上的此問題以獲取說明），並確保firmware-iwlwifi已安裝該軟體包。根據包裝內容列表，還包括所需的韌體文件。此方法特定於 Debian。

引用自：https://unix.stackexchange.com/questions/545019