禁用 lightdm 后出现的问题

Question

我有 Xubuntu 20.04，我想设置终端登录，然后转到 Xfce。所以我做了：“systemctl disable lightdm”。重新启动并确实登录终端，但 startx 没有启动，不得不执行“startxfce4”，桌面看起来有点不同，字体更模糊，我可以描述，在切换终端（Ctrl++ Alt）F1并返回 Xfce4 后，我的笔记本电脑上的触摸板停止工作，只有按钮可以工作。所以我想我回到 lightdm。sudo systemctl enable lightdm 向我显示了一条通知：

Synchronizing state of lightdm.service with SysV service script with
/lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable lightdm
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.

通过快速谷歌搜索，我发现我应该这样做：sudo systemctl unmask lightdm，然后 sudo systemctl daemon-reload。我这样做了，但结果还是一样。此外，我注意到，在完成所有这些之后，当尝试运行新闻组客户端 slrn 时，我必须再次设置新闻环境，尽管我已经在 .profile 中设置了它。

有什么解决办法吗？

- 谢谢