ArchLinux

Package	Arch Linux
Daemons for the bluetooth protocol stack	bluez
Tools to manage Bluetooth devices for Linux	bluez-tools
Bluetooth support for PulseAudio	pulseaudio-bluetooth

`bluetoothctl`

Add and trust device:

power on controller
Set agent on and default-agent
To find devices scan on
pair aa:bb:cc:dd:ee:ff
- List paired-devices pair
- To delete a paired device remove aa:bb:cc:dd:ee:ff
trust aa:bb:cc:dd:ee:ff to enable automatically re-connect
- untrust aa:bb:cc:dd:ee:ff
Edit /etc/pulse/default.pa Add ### Automatically switch to newly-connected devices Add load-module module-switch-on-connect
scan off

Event	Error	Cause	Consequence	Remedy
Connect device	`Failed to connect: org.bluez.Error.NotReady br-connection-adapter-not-powered`	Controller is not powered on.	`power on`
Connect device	`Failed to connect: org.bluez.Error.Failed br-connection-profile-unavailable`	Pulseaudio is not started.	`systemctl start --user pulseaudio`
Connect device	`Failed to connect: org.bluez.Error.Failed br-connection-unknown`	unknown	Cannot connect to device	Remove device, and pair it again.

Identify device and the port:
- pactl list | grep -Pzo '.*bluez_card(.*\n)*'
- headset-output: Headset (type: Headset, priority: 0, latency offset: 0 usec, available) Part of profile(s): a2dp_sink, handsfree_head_unit
Define a new value for latency:
- pactl set-port-latency-offset <NAME> <PORT> <BUFFER_SIZE_MICROSECONDS>
- For example: pactl set-port-latency-offset bluez_card.A1_B2_C3_D4_E5_F6 headset-output 100000
Restart bluetooth. For example systemctl restart bluetooth