# Fixing Lagging USB Headphones • Obsidian Garden

# Fixing Lagging USB Headphones

When receiving messages like this:

    Bluetooth: hci0: ACL packet for unknown connection handle 256

Create `/etc/modprobe.d/disable_btusb_autosuspend.conf` with following content:

    # Disable autosuspend for btusb to make the bluetooth keyboard work againoptions btusb enable_autosuspend=n

Then run

    mkinitcpio -P

Reboot and debug with

    $ systool -v -m btusb | grep autosuspend    enable_autosuspend = "N" # should be "N"

## Also

- That could be either `btusb.enable_autosuspend=n` or `usbcore.autosuspend=-1`
- TLP has settings for BTUSB, check it to exclude your device from autosuspend
- There's a guy on ubuntuforums, who wrote solution, which disables autosuspend manually

## Refs

- Bluetooth keyboard disconnects randomly
- Bluetooth keeps turning off
- ArchWiki: Device connects, then disconnects after a few moments
- Said solution with a script in rc.local