我一直试图将耳机或手机连接到电脑，但总是卡在“正在搜索设备”上...我尝试过申请此线程解决方案但第二个文件不可用，而且互联网上似乎没有其他备份文件。我的输出是：
sudo service bluetooth status:
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2023-05-11 19:25:03 CST; 19min ago
Docs: man:bluetoothd(8)
Main PID: 965 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 18961)
Memory: 1.9M
CPU: 126ms
CGroup: /system.slice/bluetooth.service
└─965 /usr/lib/bluetooth/bluetoothd
may 11 19:25:03 frankusky-Precision-M4800 systemd[1]: Starting Bluetooth service...
may 11 19:25:03 frankusky-Precision-M4800 bluetoothd[965]: Bluetooth daemon 5.64
may 11 19:25:03 frankusky-Precision-M4800 systemd[1]: Started Bluetooth service.
may 11 19:25:03 frankusky-Precision-M4800 bluetoothd[965]: Starting SDP server
may 11 19:25:03 frankusky-Precision-M4800 bluetoothd[965]: Bluetooth management interface 1.22 initialized
sudo dmesg | grep -i bluetooth:
[ 4.078951] NET: Registered PF_BLUETOOTH protocol family
[ 4.078952] Bluetooth: HCI device and connection manager initialized
[ 4.078955] Bluetooth: HCI socket layer initialized
[ 4.078957] Bluetooth: L2CAP socket layer initialized
[ 4.078960] Bluetooth: SCO socket layer initialized
[ 4.207441] Bluetooth: hci0: BCM: chip id 63
[ 4.208445] Bluetooth: hci0: BCM: features 0x07
[ 4.224452] Bluetooth: hci0: frankusky-Precision-M4800
[ 4.224460] Bluetooth: hci0: BCM20702A1 (001.002.014) build 0000
[ 4.232456] Bluetooth: hci0: BCM: firmware Patch file not found, tried:
[ 4.232492] Bluetooth: hci0: BCM: 'brcm/BCM20702A1-413c-8143.hcd'
[ 4.232512] Bluetooth: hci0: BCM: 'brcm/BCM-413c-8143.hcd'
[ 6.159869] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 6.159874] Bluetooth: BNEP filters: protocol multicast
[ 6.159879] Bluetooth: BNEP socket layer initialized
[ 32.520607] Bluetooth: RFCOMM TTY layer initialized
[ 32.520617] Bluetooth: RFCOMM socket layer initialized
[ 32.520624] Bluetooth: RFCOMM ver 1.11
[ 43.035687] Bluetooth: hci0: Opcode 0x 402 failed: -22
sudo lsusb; uname -a; lsmod | grep bluetooth; dmesg | grep -i firmware:
us 002 Device 004: ID 0a5c:5800 Broadcom Corp. BCM5880 Secure Applications Processor
Bus 002 Device 003: ID 413c:8143 Dell Computer Corp. Broadcom BCM20702A0 Bluetooth
Bus 002 Device 002: ID 8087:8000 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0c45:649d Microdia Laptop_Integrated_Webcam_HD
Bus 001 Device 002: ID 8087:8008 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Linux frankusky-Precision-M4800 5.19.0-41-generic #42~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Apr 18 17:40:00 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
bluetooth 827392 42 btrtl,btmtk,btintel,btbcm,bnep,btusb,rfcomm
ecdh_generic 16384 2 bluetooth
dmesg: read kernel buffer failed: Operation not permitted