Add support for EDUP Bluetooth 5.1 USB

[Alex]

Sorry, this is more of a feature request, but I didn't know where to send one, and just followed the instructions in a thread I found online!

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The EDUP Bluetooth dongle uses the Realtek RTL8761B chipset, and seems to work fine with the existing RTL8761B driver after manually patching the kernel following this guide: https://askubuntu.com/questions/835084/bluetoothctl-cant-detect-device-but-hcitool-can

Output of `hciconfig -a`

hci0: Type: Primary Bus: USB
        BD Address: 00:E0:4C:1A:58:04 ACL MTU: 1021:5 SCO MTU: 255:11
        UP RUNNING
        RX bytes:166020 acl:0 sco:0 events:2718 errors:0
        TX bytes:25153 acl:0 sco:0 commands:178 errors:0
        Features: 0xff 0xff 0xff 0xfe 0xdb 0xfd 0x7b 0x87
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'ubuntu-Server'
        Class: 0x6c0104
        Service Classes: Rendering, Capturing, Audio, Telephony
        Device Class: Computer, Desktop workstation
        HCI Version: 5.1 (0xa) Revision: 0xd99
        LMP Version: 5.1 (0xa) Subversion: 0x646b
        Manufacturer: Realtek Semiconductor Corporation (93)

Output of `usb-devices | awk '/8761/' RS=`

T: Bus=01 Lev=02 Prnt=02 Port=04 Cnt=02 Dev#= 4 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=2550 ProdID=8761 Rev=02.00
S: Manufacturer=Realtek
S: Product=Bluetooth Radio
S: SerialNumber=00E04C239987
C: #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=500mA
I: If#=0x0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
I: If#=0x1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb

Kernel version: 5.13.0-22-generic

Sorry, this is my first bug / feature report for Linux, and apologies if I've done something wrong 🙇‍♀️

Thanks!

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: linux-image-5.13.0-22-generic 5.13.0-22.22
ProcVersionSignature: Ubuntu 5.13.0-22.22-generic 5.13.19
Uname: Linux 5.13.0-22-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version k5.13.0-22-generic.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.11-0ubuntu71
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: gdm 2824 F.... pulseaudio
Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
CasperMD5CheckResult: unknown
Date: Sun Dec 19 15:07:04 2021
HibernationDevice: RESUME=/dev/mapper/ubuntu--Server--vg-swap_1
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: Hewlett-Packard HP Compaq Pro 6300 SFF
ProcEnviron:
 LANGUAGE=en_CA:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.13.0-22-generic root=/dev/mapper/ubuntu--Server--vg-root ro
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-5.13.0-22-generic N/A
 linux-backports-modules-5.13.0-22-generic N/A
 linux-firmware 1.201.3
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: Upgraded to impish on 2021-12-19 (0 days ago)
dmi.bios.date: 04/10/2019
dmi.bios.release: 3.8
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: K01 v03.08
dmi.board.asset.tag: 2UA4071FM7
dmi.board.name: 339A
dmi.board.vendor: Hewlett-Packard
dmi.chassis.asset.tag: 2UA4071FM7
dmi.chassis.type: 4
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvrK01v03.08:bd04/10/2019:br3.8:svnHewlett-Packard:pnHPCompaqPro6300SFF:pvr:rvnHewlett-Packard:rn339A:rvr:cvnHewlett-Packard:ct4:cvr:skuE0E18UP#ABA:
dmi.product.family: 103C_53307F G=D
dmi.product.name: HP Compaq Pro 6300 SFF
dmi.product.sku: E0E18UP#ABA
dmi.sys.vendor: Hewlett-Packard

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.