Mobo: Intel model: 440BX Desktop Reference Platform serial: N/A Serial: Chassis: No Enclosure type: 1 serial: N/A Type: Vmware System: VMware product: VMware Virtual Platform v: N/A Bluetooth: hci1: command 0x0c14 tx timeout Bluetooth: hci1: RTL: fw version 0x0d99646b Bluetooth: hci1: RTL: cfg_sz 25, total sz 21389 bluetooth hci1: firmware: direct-loading firmware rtl_bt/rtl8761bu_config.bin Bluetooth: hci1: RTL: loading rtl_bt/rtl8761bu_config.bin bluetooth hci1: firmware: direct-loading firmware rtl_bt/rtl8761bu_fw.bin Bluetooth: hci1: RTL: loading rtl_bt/rtl8761bu_fw.bin Bluetooth: hci1: RTL: rom_version status=0 version=1 Bluetooth: hci1: RTL: examining hci_ver=0a hci_rev=000b lmp_ver=0a lmp_subver=8761 usb 2-2.2: Product: TP-Link UB500 Adapter usb 2-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 2-2.2: New USB device found, idVendor=2357, idProduct=0604, bcdDevice= 2.00 usb 2-2.2: new full-speed USB device number 6 using uhci_hcd Then just remove the Bluetooth 5.0 adapter from the PC and plug it in again, and it should be working.Ĭode: Select all usb 2-2.2: USB disconnect, device number 5 Sudo ln -s rtl8761b_fw.bin rtl8761bu_fw.bin Sudo ln -s rtl8761b_config.bin rtl8761bu_config.bin Simply create a soft link on the rtl_bt/rtl8761bu_fw.bin file like this in the Terminal: In this way, any time the system requests the rtl8761bu files it will load the correct rtl8761b ones. To fix this issue, just create a symbolic link to link the rtl8761bu driver firmware to the rtl8761b one. This happens because the rtl8761bu firmware is being requested, but the system should have loaded the rtl8761b firmware, not the rtl8761bu one. In other words, the driver is there on the system and has no issue, but it is not loaded correctly when the Bluetooth device is plugged into the PC. Some Bluetooth 5.0 adapters which use the rtl8761b firmware are not working correctly on Ubuntu 20.04 and 22.04 (Possibly other Linux distributions too), because of a bug in loading the correct driver for these devices.
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