未满足 ConditionPathIsDirectory=/sys/class/bluetooth

Question

systemctl status bluetooth 的输出是：

    ● bluetooth.service - Bluetooth service
   Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
   Active: inactive (dead)
Condition: start condition failed at Thu 2020-12-17 01:23:52 WET; 28min ago
           └─ ConditionPathIsDirectory=/sys/class/bluetooth was not met
     Docs: man:bluetoothd(8)

我已经使用 Win10 双重启动，并且可以正常使用蓝牙。有什么帮助吗？

提前致谢