[PROBLEM] Bluetooth Audio output (Transmitter)

[ppianigiani]

I've made a few more testing with your "standard" approach (xbmc service autostarted, pulseaudio automatically started by Kodi and USERRUN script to connect the BT device) with a slightly modified script, collecting the script output to a log file (otherwise, it won't be collected on any file, right?), like this:

Code:

#!/bin/sh

echo "-----------------------------------" >>~/user-run.log
echo "$(date) $0 $@" >>~/user-run.log
echo "-----------------------------------" >>~/user-run.log

case $1 in

        preload)                # Invoked by /etc/init/xbmc-preload.conf
                case $2 in
                        start)
                                ;;
                        stop)
                                # This should never happen
                                ;;
                esac
                ;;

        xbmc)                   # Invoked by /etc/init/xbmc.conf
                case $2 in
                        start)
                                # Check if process pulseaudio is already running
                                pgrep -a pulseaudio >>~/user-run.log || echo "***ERROR: pulseaudio is not running yet!" >>~/user-run.log

                                # Wait some time for bluetoothd
                                for i in $(seq 1 10); do
                                     pgrep -a bluetoothd >>~/user-run.log && break
                                     sleep 1
                                done
                                # Connect my BT headphones if bluetoothd is running
                                pgrep -a bluetoothd >>~/user-run.log && sudo -u xbian bluetoothctl connect 89:2B:5A:9B:AE:50 &
                                # Wait until connect has been done
                                for i in $(seq 1 10); do
                                      pgrep -a bluetoothctl >>~/user-run.log || break
                                      sleep 1
                                done
                                #pkill bluetoothctl >>~/user-run.log
                                ;;
                        stop)
                                ;;
                esac
                ;;

        screensaver)            # Invoked by /etc/init/xbmc-screensaver.conf
                case $2 in
                        start)
                                ;;
                        stop)
                                ;;
                esac
                ;;

esac

exit 0

This is the script log after a reboot:

Code:

-----------------------------------
Mon Jun  7 16:32:25 CEST 2021 /usr/local/sbin/user-run.sh xbmc stop
-----------------------------------
-----------------------------------
Mon Jun  7 16:32:26 CEST 2021 /usr/local/sbin/user-run.sh xbmc start
-----------------------------------
***ERROR: pulseaudio is not running yet!
2623 /usr/sbin/bluetoothd
2623 /usr/sbin/bluetoothd

First of all, is it expected that the USERRUN script is firstly run as "xbmc stop" and then as "xbmc start"? I didn't expect "stop" first, if not at all...

Then, it seems that pulseaudio is not running yet when the script is executed: I've also try to wait inside the script for pulseaudio to start, but it seems it's always started AT THE END of the script, no matter how long it takes: is this expected too?
So, in the end, this seems to be the real issue cause: pulseaudio not running yet when trying to connect the BT device.
If so, given this should be the normal behaviour of the USERRUN script, I'm wondering how the BT connection works fine on your systems: maybe you're using something different from pulseaudio?