我是 Linux 新手。我的蓝牙有问题。连接几秒钟后，耳机不断断开连接。音频系统 5.1“Dialog”也是如此。我无法从手机传输文件（虽然我并不真正需要此功能，只是为了测试系统）。如何让蓝牙正常工作？Ubuntu 21.10、联想 IdeaPad L340-15IRH Gaming、Gnome 版本 40.4.0
命令：
systemctl | grep -i blue
dmesg | grep -i blue
lspci
bluetoothctl
rfkill list all
lsusb
1.命令输出：
sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d14-1\x2d14:1.0-bluetooth-hci0.device loaded active plugged /sys/devices/pci0000:00/0000:00:14.0/usb1/1-14/1-14:1.0/bluetooth/hci0
sys-subsystem-bluetooth-devices-hci0.device loaded active plugged /sys/subsystem/bluetooth/devices/hci0
bluetooth.service loaded active running Bluetooth service
bluetooth.target loaded active active Bluetooth
2 命令
[ 2.470919] usb 1-14: Product: Bluetooth Radio
[ 5.008234] Bluetooth: Core ver 2.22
[ 5.008302] Bluetooth: HCI device and connection manager initialized
[ 5.008324] Bluetooth: HCI socket layer initialized
[ 5.008333] Bluetooth: L2CAP socket layer initialized
[ 5.008354] Bluetooth: SCO socket layer initialized
[ 5.144936] Bluetooth: hci0: RTL: examining hci_ver=08 hci_rev=000c lmp_ver=08 lmp_subver=8821
[ 5.145943] Bluetooth: hci0: RTL: rom_version status=0 version=1
[ 5.145948] Bluetooth: hci0: RTL: loading rtl_bt/rtl8821c_fw.bin
[ 5.377606] Bluetooth: hci0: RTL: loading rtl_bt/rtl8821c_config.bin
[ 5.380594] Bluetooth: hci0: RTL: cfg_sz 10, total sz 31990
[ 5.853994] Bluetooth: hci0: RTL: fw version 0x829a7644
[ 11.964450] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 11.964454] Bluetooth: BNEP filters: protocol multicast
[ 11.964459] Bluetooth: BNEP socket layer initialized
[ 32.200317] Bluetooth: RFCOMM TTY layer initialized
[ 32.200325] Bluetooth: RFCOMM socket layer initialized
[ 32.200330] Bluetooth: RFCOMM ver 1.11
[ 259.058704] traps: bluetooth[10701] trap divide error ip:7f6da086c440 sp:7f6da8d1bc30 error:0 in module-bluez5-device.so[7f6da086a000+9000]
[ 297.394771] Bluetooth: hci0: HCI reset during shutdown failed
3 命令
00:00.0 Host bridge: Intel Corporation 8th Gen Core 4-core Processor Host Bridge/DRAM Registers [Coffee Lake H] (rev 07)
00:01.0 PCI bridge: Intel Corporation 6th-10th Gen Core Processor PCIe Controller (x16) (rev 07)
00:02.0 VGA compatible controller: Intel Corporation CoffeeLake-H GT2 [UHD Graphics 630]
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 07)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Cannon Lake PCH Thermal Controller (rev 10)
00:14.0 USB controller: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller (rev 10)
00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10)
00:15.0 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH Serial IO I2C Controller #0 (rev 10)
00:15.1 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH Serial IO I2C Controller #1 (rev 10)
00:16.0 Communication controller: Intel Corporation Cannon Lake PCH HECI Controller (rev 10)
00:17.0 SATA controller: Intel Corporation Cannon Lake Mobile PCH SATA AHCI Controller (rev 10)
00:1d.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #9 (rev f0)
00:1d.4 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #13 (rev f0)
00:1d.5 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #14 (rev f0)
00:1e.0 Communication controller: Intel Corporation Cannon Lake PCH Serial IO UART Host Controller (rev 10)
00:1f.0 ISA bridge: Intel Corporation HM470 Chipset LPC/eSPI Controller (rev 10)
00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH SPI Controller (rev 10)
01:00.0 VGA compatible controller: NVIDIA Corporation TU117M [GeForce GTX 1650 Mobile / Max-Q] (rev a1)
01:00.1 Audio device: NVIDIA Corporation Device 10fa (rev a1)
06:00.0 Non-Volatile memory controller: Lite-On Technology Corporation Device 9100 (rev 03)
07:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter
08:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
4 命令
Agent registered
第五条命令
[bluetooth]# rfkill list all
Invalid command in menu main: rfkill
Use "help" for a list of available commands in a menu.
Use "menu <submenu>" if you want to enter any submenu.
Use "back" if you want to return to menu main.
从终端的新选项卡执行第五个：
$ rfkill list all
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
3: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
6命令：
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 5986:2113 Acer, Inc SunplusIT Integrated Camera
Bus 001 Device 002: ID 258a:0024 SINOWEALTH Wired Gaming Mouse
Bus 001 Device 004: ID 0bda:c024 Realtek Semiconductor Corp. Bluetooth Radio
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
答案1
当我将我的华硕 VivoBook S14 升级到 21.10 后，我也遇到了类似的问题，JBL 扬声器在几秒钟后断开连接。
从蓝牙设置对话框中删除该设备并再次添加对我有用（之前我试图连接，因为设备已列出）
答案2
尝试重新启动蓝牙驱动程序
sudo systemctl 重启蓝牙