Hi!

Banana pi m1, armbian Ubuntu Xenial Legacy 3.4.113, bluetooth usb dongle. I can find bananapi from other devices, but can`t  pair whit any device.

journalctl -u bluetooth
ar 15 16:05:11 bananapi systemd[1]: Starting Bluetooth service...
Mar 15 16:05:11 bananapi bluetoothd[646]: Bluetooth daemon 5.37
Mar 15 16:05:11 bananapi bluetoothd[646]: Starting SDP server
Mar 15 16:05:11 bananapi systemd[1]: Started Bluetooth service.
Mar 15 16:05:11 bananapi bluetoothd[646]: Bluetooth management interface 1.0 initialized
Mar 15 16:05:11 bananapi bluetoothd[646]: Failed to obtain handles for "Service Changed" characteristic
Mar 15 16:05:11 bananapi bluetoothd[646]: Not enough free handles to register service
Mar 15 16:05:11 bananapi bluetoothd[646]: Error adding Link Loss service
Mar 15 16:05:11 bananapi bluetoothd[646]: Not enough free handles to register service
Mar 15 16:05:11 bananapi bluetoothd[646]: Not enough free handles to register service
Mar 15 16:05:11 bananapi bluetoothd[646]: Not enough free handles to register service
Mar 15 16:05:11 bananapi bluetoothd[646]: Current Time Service could not be registered
Mar 15 16:05:11 bananapi bluetoothd[646]: gatt-time-server: Input/output error (5)
Mar 15 16:05:11 bananapi bluetoothd[646]: Not enough free handles to register service
Mar 15 16:05:11 bananapi bluetoothd[646]: Not enough free handles to register service
Mar 15 16:05:11 bananapi bluetoothd[646]: Sap driver initialization failed.
Mar 15 16:05:11 bananapi bluetoothd[646]: sap-server: Operation not permitted (1)
Mar 15 16:13:07 bananapi bluetoothd[646]: Ignoring unsupported UUID for addition

Any ideas?

https://www.armbian.com/banana-pi ->"Known issues"

I have two different USB BT keys and both work fine only on mainline kernel.

Yeh, I checked. Problem in kernel? Are there ways to solve the problem? Recompile the kernel? Patches?

I need only legacy kernel for video acceleration.

Here a nanopi neo with a logilink bt0009 paired with a "chip"

 

root@hub:~# lsusb | grep -i bluetooth
Bus 008 Device 002: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
root@hub:~# uname -a
Linux hub 3.4.113-sun8i #20 SMP PREEMPT Fri Dec 30 14:37:10 CET 2016 armv7l armv7l armv7l GNU/Linux
root@hub:~# echo "paired-devices" | bluetoothctl
[NEW] Controller 00:15:83:54:9C:58 hub [default]
[NEW] Device A0:2C:36:25:26:F3 btst
[bluetooth]# paired-devices
Device A0:2C:36:25:26:F3 btst
[DEL] Controller 00:15:83:54:9C:58 hub [default]
[bluetooth]#

root@hub:~# bluetoothd -v
5.37

 

But I had a lot of trouble with the same dongle yesterday to connect through RFCOMM and used a BT0015 for that use

 

With bluez never try to understand why or when it works or dont.

 

So ... Same player shoot again : try not to be too close or too far, avoid interferences (usb, wifi, bt ...), reboot to clean kernel and user space daemon state, remove devices, clean /var/lib/bluetooth, stop scan as soon as you have discovered peer, increase delay in main.conf ...