wiki:
https://wiki.archlinux.org/title/Bluetooth_(簡體中文)
1. 確保藍牙服務開機啓動
systemctl enable bluetooth
2. 打開自動鏈接
配置文件：/etc/bluetooth/main.conf
# AutoEnable defines option to enable all controllers when they are found.
# This includes adapters present on start as well as adapters that are plugged
# in later on. Defaults to 'false'.
# AutoEnable 設置爲true可以在設備發現時自動鏈接上
AutoEnable=true