https://kb.plugable.com/680389/bluetooth-headphones-speaker-or-headset-isnt-working-in-windows-linux#what-are-some-of-the-known-issues-and-fixes-in-linux

BlueTooth USB Adapter
funktioniert nicht unter Linux Mint v etc/issue: LMDE 2 Betsy, /etc/debian_version: 8.11

evtl. andere  version Bluez als bluez-5.52 benötigt, diese downloaden und compilieren:


What Are Some of the Known Issues and Fixes in Linux?

In Linux there are three primary components responsible for Bluetooth audio connections. Drivers for the Bluetooth hardware, the BlueZ project, and the Pulseaudio project.

For several years now, the driver for the Plugable Bluetooth adapter has been built into the Linux kernel. So driver support is not the issue.

Rather, the main issues revolve around the BlueZ and Pulseaudio opensource projects. One or both of these projects tend to break on a regular basis. We've found that BlueZ versions past 5.52 have issues with Bluetooth audio. As of October 2020, this issue still does not seem to be resolved on Ubuntu 20.10-based distros which seem to be shipping with BlueZ 5.55.

The following instructions tend to fix Bluetooth audio problems on Debian-based distros distributed after Ubuntu 16.10. Most recently, these steps were tested on Pop!_OS 20.10 with a successful result. Non-Debian distros may use a package manager other than apt-get, the instructions should work as long as you change out 'apt-get' with the package manager for your distro.

    Download and extract BlueZ 5.52:

    wget http://www.kernel.org/pub/linux/bluetooth/bluez-5.52.tar.xz && tar xf bluez-5.52.tar.xz
    Install the libraries necessary to successfully build and install BlueZ, as well as additional audio profile support:

    sudo apt-get install pulseaudio-module-bluetooth libusb-dev libdbus-1-dev libglib2.0-dev libudev-dev libical-dev libreadline-dev blueman
    Stop Bluetooth services:

    sudo /etc/init.d/bluetooth stop
    Then in the BlueZ directory you should still be in; configure, make, and make install:

    sudo ./configure && sudo make && sudo make install
    Once the install process is complete, restart the PC.

    sudo reboot

Another improvement from using BlueZ 5.52 is that Bluetooth LE HID devices like mice and keyboards are supported through the HID over GATT profile (HoG). We have found that the Microsoft Designer Mouse and Keyboard work in Linux after updating BlueZ.