指纹服务 fprintd 在开机的时候，没有自动启动，无法立即使用指纹来登录系统。

使用 systemctl 设置的时候，报错：

systemctl enable fprintd.service
The unit files have no installation config (WantedBy=, RequiredBy=, Also=,
Alias= settings in the [Install] section, and DefaultInstance= for template
units). This means they are not meant to be enabled using systemctl.

Possible reasons for having this kind of units are:
* A unit may be statically enabled by being symlinked from another unit's
  .wants/ or .requires/ directory.
* A unit's purpose may be to act as a helper for some other unit which has
  a requirement dependency on it.
* A unit may be started when needed via activation (socket, path, timer,
  D-Bus, udev, scripted systemctl call, ...).
* In case of template units, the unit is meant to be enabled with some
  instance name specified.

后了解到 fprintd 是通过 dbus 启动，有哪位大虾知道如何设置它开机自动启动吗？
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FROM 116.25.15.*