check device model end errors:
uname
lsusb | grep -i bluetooth
dmesg | grep bluetooth

get model of computer:
dmidecode -t system | grep -i "serial number"

download win 7 driver:
sudo apt-get install innoextract

extract exe:
innoextract g4wb12ww.exe

cd app/Win64/

find model and appropriate hex:
nano bcbtums-win7x64-brcm.inf

hex2hcd BCM20702A1_001.002.014.0449.0462.hex

sudo cp BCM20702A1_001.002.014.0449.0462.hex /lib/firmware/brcm/BCM20702A1-0a5c-21e6.hcd

reboot

ne ponasa se bas pouzadano, nekad odmah radi nekad ne radi!? npr kod odabira outputa ne čuje se zvuk iz zvučnika, čak se ne može playat nikakav sadržaj koji ima zvuk.

za setupiranje detalja treba pokrenuti:
pavucontrol

disable pulseaudio's bluetooth in gdm:

nano /var/lib/gdm3/.config/pulse/default.pa

!/usr/bin/pulseaudio -nF

#

load system wide configuration

.include /etc/pulse/default.pa

unload driver modules for Bluetooth hardware

.ifexists module-bluetooth-policy.so
unload-module module-bluetooth-policy
.endif

.ifexists module-bluetooth-discover.so
unload-module module-bluetooth-discover
.endif