Ubuntu 20.04 中的蓝牙 5.0

Question

我刚刚买了一个新的 USB 蓝牙 5.0。但是，我无法在 Ubuntu 设置中打开蓝牙。但旧的蓝牙4.0 USB 可以正常工作。制造商声称它是即插即用的并且与Linux兼容。我的操作系统是 Ubuntu 20.04。有人可以帮忙吗？

没有蓝牙 USB 时 lsusb 的输出：

   Bus 002 Device 010: ID 2109:0812 VIA Labs, Inc. VL812 Hub
   Bus 002 Device 016: ID 0781:558c SanDisk Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 008: ID 2109:0812 VIA Labs, Inc. VL812 Hub
   Bus 002 Device 015: ID 0781:5583 SanDisk Corp. Ultra Fit
   Bus 002 Device 006: ID 0bda:0411 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 003: ID 0bda:0411 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 007: ID 0bc2:5031 Seagate RSS LLC FreeAgent GoFlex USB 3.0
   Bus 002 Device 004: ID 0bda:0411 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 002: ID 0bda:0411 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 009: ID 24ae:2010 RAPOO Rapoo 2.4G Wireless Device
   Bus 001 Device 010: ID 2109:2812 VIA Labs, Inc. VL812 Hub
   Bus 001 Device 007: ID 2109:2812 VIA Labs, Inc. VL812 Hub
   Bus 001 Device 018: ID 2357:0115 TP-Link 802.11ac NIC
   Bus 001 Device 006: ID 0bda:5411 Realtek Semiconductor Corp. 4-Port USB 2.0 Hub
   Bus 001 Device 003: ID 0bda:5411 Realtek Semiconductor Corp. 4-Port USB 2.0 Hub
   Bus 001 Device 021: ID 1058:25a1 Western Digital Technologies, Inc. Elements
   Bus 001 Device 020: ID 2109:2812 VIA Labs, Inc. VL812 Hub
   Bus 001 Device 019: ID 2109:2812 VIA Labs, Inc. VL812 Hub
   Bus 001 Device 004: ID 0bda:5411 Realtek Semiconductor Corp. 4-Port USB 2.0 Hub
   Bus 001 Device 002: ID 0bda:5411 Realtek Semiconductor Corp. 4-Port USB 2.0 Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

lsusb 与蓝牙 5.0 USB 的输出（不起作用）：

   Bus 002 Device 010: ID 2109:0812 VIA Labs, Inc. VL812 Hub
   Bus 002 Device 016: ID 0781:558c SanDisk Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 008: ID 2109:0812 VIA Labs, Inc. VL812 Hub
   Bus 002 Device 015: ID 0781:5583 SanDisk Corp. Ultra Fit
   Bus 002 Device 006: ID 0bda:0411 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 003: ID 0bda:0411 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 007: ID 0bc2:5031 Seagate RSS LLC FreeAgent GoFlex USB 3.0
   Bus 002 Device 004: ID 0bda:0411 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 002: ID 0bda:0411 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 009: ID 24ae:2010 RAPOO Rapoo 2.4G Wireless Device
   Bus 001 Device 010: ID 2109:2812 VIA Labs, Inc. VL812 Hub
   Bus 001 Device 007: ID 2109:2812 VIA Labs, Inc. VL812 Hub
   Bus 001 Device 018: ID 2357:0115 TP-Link 802.11ac NIC
   Bus 001 Device 030: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
   Bus 001 Device 006: ID 0bda:5411 Realtek Semiconductor Corp. 4-Port USB 2.0 Hub
   Bus 001 Device 003: ID 0bda:5411 Realtek Semiconductor Corp. 4-Port USB 2.0 Hub
   Bus 001 Device 021: ID 1058:25a1 Western Digital Technologies, Inc. Elements
   Bus 001 Device 020: ID 2109:2812 VIA Labs, Inc. VL812 Hub
   Bus 001 Device 019: ID 2109:2812 VIA Labs, Inc. VL812 Hub
   Bus 001 Device 004: ID 0bda:5411 Realtek Semiconductor Corp. 4-Port USB 2.0 Hub
   Bus 001 Device 002: ID 0bda:5411 Realtek Semiconductor Corp. 4-Port USB 2.0 Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

lsusb 与蓝牙 4.0 USB 的输出（有效）：

   Bus 002 Device 010: ID 2109:0812 VIA Labs, Inc. VL812 Hub
   Bus 002 Device 016: ID 0781:558c SanDisk Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 008: ID 2109:0812 VIA Labs, Inc. VL812 Hub
   Bus 002 Device 015: ID 0781:5583 SanDisk Corp. Ultra Fit
   Bus 002 Device 006: ID 0bda:0411 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 003: ID 0bda:0411 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 007: ID 0bc2:5031 Seagate RSS LLC FreeAgent GoFlex USB 3.0
   Bus 002 Device 004: ID 0bda:0411 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 002: ID 0bda:0411 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 009: ID 24ae:2010 RAPOO Rapoo 2.4G Wireless Device
   Bus 001 Device 010: ID 2109:2812 VIA Labs, Inc. VL812 Hub
   Bus 001 Device 007: ID 2109:2812 VIA Labs, Inc. VL812 Hub
   Bus 001 Device 018: ID 2357:0115 TP-Link 802.11ac NIC
   Bus 001 Device 031: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
   Bus 001 Device 006: ID 0bda:5411 Realtek Semiconductor Corp. 4-Port USB 2.0 Hub
   Bus 001 Device 003: ID 0bda:5411 Realtek Semiconductor Corp. 4-Port USB 2.0 Hub
   Bus 001 Device 021: ID 1058:25a1 Western Digital Technologies, Inc. Elements
   Bus 001 Device 020: ID 2109:2812 VIA Labs, Inc. VL812 Hub
   Bus 001 Device 019: ID 2109:2812 VIA Labs, Inc. VL812 Hub
   Bus 001 Device 004: ID 0bda:5411 Realtek Semiconductor Corp. 4-Port USB 2.0 Hub
   Bus 001 Device 002: ID 0bda:5411 Realtek Semiconductor Corp. 4-Port USB 2.0 Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Answer 1

我的蓝牙 5.0 适配器也经历了同样的情况，在 Ubuntu 20.04 上将内核更新到内核版本 5.15 后，蓝牙适配器突然无法工作。

由于某种原因，Linux 内核 5.15 现在正在寻找 rtl8761bu_fw.bin 和 rtl8761bu_config.bin。

1. 如果您还没有 rtl8761b 配置和蓝牙驱动程序文件，请从 GitHub 下载它们：

wget https://raw.githubusercontent.com/Realtek-OpenSource/android_hardware_realtek/rtk1395/bt/rtkbt/Firmware/BT/rtl8761b_config
wget https://raw.githubusercontent.com/Realtek-OpenSource/android_hardware_realtek/rtk1395/bt/rtkbt/Firmware/BT/rtl8761b_fw

2. 将文件移动到 /lib/firmware/rtl_bt 目录：

sudo mv rtl8761b_config /lib/firmware/rtl_bt/rtl8761b_config.bin
sudo mv rtl8761b_fw /lib/firmware/rtl_bt/rtl8761b_fw.bin

3. 将 rtl8761b 驱动程序重命名为 rtl8761bu：

sudo cp /lib/firmware/rtl_bt/rtl8761b_config.bin /lib/firmware/rtl_bt/rtl8761bu_config.bin
sudo cp /lib/firmware/rtl_bt/rtl8761b_fw.bin /lib/firmware/rtl_bt/rtl8761bu_fw.bin

4. 重启