我刚买了一台二手戴尔 Latitude 7370，安装了 Ubuntu 18.04 LTS。我对 Linux 还很陌生。我的蓝牙可以识别新设备，但无法配对（无法与耳机配对，也无法与安卓手机配对）。设置中设备的蓝牙“连接”按钮（见图）会自动返回到未配对位置。我尝试
输出uname -a; lspci -nnk | grep -iA2 net; lsusb; dmesg | grep -i bluetooth; dmesg | grep -i firmware; lsmod | grep bluetooth
6d:00.0 Network controller [0280]: Intel Corporation Wireless 8260 [8086:24f3] (rev 3a)
Subsystem: Intel Corporation Wireless 8260 [8086:0150]
Kernel driver in use: iwlwifi
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 0bda:5768 Realtek Semiconductor Corp.
Bus 001 Device 004: ID 0a5c:5832 Broadcom Corp.
Bus 001 Device 003: ID 04f3:2335 Elan Microelectronics Corp.
Bus 001 Device 002: ID 8087:0a2b Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[ 23.069600] Bluetooth: Core ver 2.22
[ 23.069627] Bluetooth: HCI device and connection manager initialized
[ 23.070445] Bluetooth: HCI socket layer initialized
[ 23.070447] Bluetooth: L2CAP socket layer initialized
[ 23.070454] Bluetooth: SCO socket layer initialized
[ 23.250769] Bluetooth: hci0: Firmware revision 0.0 build 176 week 45 2017
[ 23.276708] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 23.276710] Bluetooth: BNEP filters: protocol multicast
[ 23.276715] Bluetooth: BNEP socket layer initialized
[ 47.156693] Bluetooth: RFCOMM TTY layer initialized
[ 47.156700] Bluetooth: RFCOMM socket layer initialized
[ 47.156705] Bluetooth: RFCOMM ver 1.11
[ 2809.123397] Bluetooth: hci0: HCI reset during shutdown failed
[ 0.223112] Spectre V2 : Enabling Restricted Speculation for firmware calls
[ 0.370907] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[ 3.511195] [drm] Finished loading DMC firmware i915/skl_dmc_ver1_27.bin (v1.27)
[ 22.067513] iwlwifi 0000:6d:00.0: loaded firmware version 36.e91976c0.0 op_mode iwlmvm
[ 23.250769] Bluetooth: hci0: Firmware revision 0.0 build 176 week 45 2017
bluetooth 573440 39 btrtl,btintel,btbcm,bnep,btusb,rfcomm
ecdh_generic 16384 2 bluetooth
输出rfkill list all
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
输出systemctl status bluetooth.service
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; disabled; vendor preset: enabled)
Active: active (running) since Tue 2020-03-31 15:34:56 CEST; 2h 43min ago
Docs: man:bluetoothd(8)
Main PID: 1152 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 4915)
CGroup: /system.slice/bluetooth.service
└─1152 /usr/lib/bluetooth/bluetoothd
mar 31 17:39:35 ubuntophe bluetoothd[1152]: a2dp-sink profile connect failed for 00:02:72:EC:8C:E2: Protocol not available
mar 31 18:23:50 ubuntophe bluetoothd[1152]: Failed to set mode: Blocked through rfkill (0x12)
mar 31 18:27:02 ubuntophe bluetoothd[1152]: Failed to set mode: Blocked through rfkill (0x12)
mar 31 18:27:17 ubuntophe bluetoothd[1152]: a2dp-sink profile connect failed for 00:02:72:EC:8C:E2: Protocol not available
非常感谢您提供的帮助。