突然，我的锁屏从检测用户名并要求输入密码的 gnome（蓝色）锁屏变成了要求输入用户名和密码的登录屏幕。我试图恢复它，但什么也没用。
我在/var/log/apt/history.log文件中找到了这一点：
Start-Date: 2020-10-18 08:28:59
Commandline: apt install kali-defaults kali-root-login desktop-base xfce4 xfce4-places-plugin xfce4-goodies
Requested-By: username (1000)
Install: xfburn:amd64 (0.6.2-1, automatic), libisofs6:amd64 (1.5.2-1, automatic), thunar-media-tags-plugin:amd64 (0.3.0-2, automatic), xfce4-dict:amd64 (0.8.3-1, automatic), xfce4-goodies:amd64 (4.14.0), xfce4-terminal:amd64 (0.8.9.2-1, automatic), libburn4:amd64 (1.5.2-1, automatic), kali-root-login:amd64 (2019.4.0), libjte2:amd64 (1.22-3, automatic)
Upgrade: kali-defaults:amd64 (2020.3.4, 2020.4.2)
End-Date: 2020-10-18 08:29:56