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I recently bought a Samsung Level U bluetooth headset and succesfully connected it to my computer.

I use Arch Linux and followed the tutorial in Arch Wiki to connect it. It uses A2DP profile and works fine for a while but when I - say paused a video and wait for a while - and continue playing the video, both video and sound lags and I have to basically power off/on my headset or disconnect via bluetoothctl and reconnect.

Sometimes if I try to disconnect and immediately reconnect via bluetoothctl it gives a bluez.error and fails.

Some info:
Arch Linux
pulseaudio  11.1
bluez       5.47

I can provide configuration files alas I don't know which ones are relevant.

Thanks.

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Some BT adapters has a bug in suspend mode. My solution for Asus BT400:

Find vendor and product id:

$ lsusb | grep Bluetooth
Bus 001 Device 011: ID 0b05:17cb ASUSTek Computer, Inc. Broadcom BCM20702A0 Bluetooth

In this example vendor id is 0b05 and product id is 17cb.

Create file /etc/udev/rules.d/70-persistent-bluetooth.rules with your ids from previous step:

# Bluetooth devices.

# Asus BT400 bluetooth adapter.
ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="0b05", ATTR{idProduct}=="17cb", ATTR{power/autosuspend}="0"

Set mode to 644:

chmod 644 /etc/udev/rules.d/70-persistent-bluetooth.rules

Reconnect your adapter or change attribute manualy by:

echo 0 > /sys/bus/usb/devices/YOUR/DEVICE/power/autosuspend

Enjoy!

Some useful info commands:

udevadm info -a -p $(udevadm info -q path -n /dev/bus/usb/BUS_ID/DEVICE_ID)
udevadm test '//devices/DEVICE_PATH'

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