I have Ubuntu mate 18.04 & recently I bought Haylou GT 1 Pro earbuds, which connects to mobile / laptop directly , each one connects with same name ,
So they are working fine with Android 9 mobile but not working in Ubuntu, I hear no sound and Bluetooth manager shows connected.
I have another earphone from same brand with Master-Slave configuration which is working.
[ 1313.700337] input: E8:EC:A3:1E:14:B0 as /devices/virtual/input/input26
[Haylou-GT1 Pro]# info
Device E8:EC:A3:1E:14:B0 (public)
Name: Haylou-GT1 Pro
Alias: Haylou-GT1 Pro
UUID: Serial Port (00001101-0000-1000-8000-00805f9b34fb)
UUID: Headset (00001108-0000-1000-8000-00805f9b34fb)
UUID: Audio Sink (0000110b-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
UUID: Advanced Audio Distribu.. (0000110d-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control (0000110e-0000-1000-8000-00805f9b34fb)
UUID: Handsfree (0000111e-0000-1000-8000-00805f9b34fb)