Solved: Bluetooth Adapter Is Not Detected

[bytestream]

Hello,

I bought a bluetooth usb adapter (Miilink BT501) i tested it in windows so i know it works. When i boot in Linux Mint it is not detected. I go to the default bluetooth app, it looks like it turns on the bluetooth but it does not detect my adapter.

I run Linux Mint 20.1 x86_64, Kernel 5.4.0-72-generic, Blueman-manager version 2.1.2, Bluez* 5.53-0ubuntu3

When i run blueman-manager in command line i get this output:

blueman-manager version 2.1.2 starting
Failed to enable bluetooth
blueman-manager 21.24.36 ERROR Manager:118 on_dbus_name_appeared: Default adapter not found, trying first available.
blueman-manager 21.24.36 ERROR Manager:122 on_dbus_name_appeared: No adapter(s) found, exiting

I don't really understand how to configure bluetooth. Do i have to "connect" blueman to bluez?

Thanks for your time.

 

[KGIII]

What's the Bluetooth information that is output from the command `lsusb`?

 

[bytestream]

Here is what i get:
Bus 005 Device 002: ID 0bda:8771 Realtek Semiconductor Corp. Bluetooth Radio

 

[KGIII]

And the output of `uname -a` is?

It's supported in the 5.8 kernel, which is why I ask. See here: https://linuxreviews.org/Realtek_RTL8761B

 

[bytestream]

The output of uname -a:
Linux ernest 5.4.0-72-generic #80-Ubuntu SMP Mon Apr 12 17:35:00 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

I run kernel 5.4 so this is why it does not work? If so is there a safe way to run 5.8 or should i just wait? In the link you send there are some people in the comments saying that you can make it work with an older kernel should i try one of these methods?

This one looks like it might work:

Install C-TECH BTD-01 Bluetooth adapter on Ubuntu 20.10 (Realtek 8761b)

Introduction

robertsibek.medium.com

 

[KGIII]

You could use the firmware and follow some of the links in the comments. They're having success and the link gives directions for use.

You could also try using a newer kernel. (This includes using an OS with a newer kernel.)

Those are your two realistic options. For example, try booting into a live USB with Ubuntu 20.10 to see if it works out of the box. (That should have a 5.8 or higher kernel.)

Of course, you could buy different hardware, but your existing hardware can be made to work.

 

[bytestream]

Update:
I followed the guide in the link i sent above. It still does not work. I read a bit more and i thought maybe secure boot has something to do with this, however my computer probably does not support secure boot (msi 970a-g43 plus). I will read more from linuxreviews and i will post if i make any progress.

Thank you.

 

[bytestream]

Solved:
I went to https://aur.archlinux.org/packages/rtl8761b-fw/ and i downloaded https://mpow.s3-us-west-1.amazonaws.com/mpow_BH519A_driver+for+Linux.7z

I extracted the file, cd to it, and then i did sudo make install INTERFACE=all

Now it works. Thank you KGIII the link you sent had all the info i needed.

 

[KGIII]

Glad it's sorted.

 

[HardyOllie]

Hi everyone, I'm having the same issues here.
@KGIII Would you have a link for ubuntu 20, too?

Fixed it, reinstalled the original drivers. But why did the drivers get lost in the first place?

 

[KGIII]

Do you mean 20.04 or 20? There's an Ubuntu 20, but it's a Core version - meant for embedded systems. 20.04 is the version of Ubuntu for desktops/laptops or even a Pi if you've got one of those. Most folks want 20.04, regular Ubuntu, so I'll start by just linking that:

Download Ubuntu Desktop | Download | Ubuntu

Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things.

ubuntu.com

 

[KGIII]

Actually, I'll also link Core, seeing as I'm right there on the download pages already:

Download Ubuntu for IoT boards | Download | Ubuntu

Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things.

ubuntu.com

 

[HardyOllie]

Do you mean 20.04 or 20? There's an Ubuntu 20, but it's a Core version - meant for embedded systems. 20.04 is the version of Ubuntu for desktops/laptops or even a Pi if you've got one of those. Most folks want 20.04, regular Ubuntu, so I'll start by just linking that:

Download Ubuntu Desktop | Download | Ubuntu

Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things.

ubuntu.com

20.04, I'm just going with the mainstream bc I know not enough to go for untrodden paths ...
I also noticed that my communication was sloppy bc I did not refer to the Bluetooth adapter for archlinux that solved bytestream's issue - since I'm using Ubuntu I hoped you could point a similar adapter to me. However, doing another make install with the original drivers solved my problems already, so all is well. Thank you anyways!