I am having difficulties to configure the xfce4-settings-manager to show many configuration applications. Actually, the xfce4-settings-manager is showing only the configurations directly related to xfce4 and a few others.
The image showing the situation is here. On the left side, it can be seen the host system, where xfce4-settings-manager is showing the configurations correctly. On the right side, its the Virtual Machine with the problematic configuration. Under Sistema (System), many applications, as users-admin, software-properties-gtk and others are missing.
I tried to use dpkg-reconfigure xfce4-settings, which had no success.
When comparing the host and the virtual system, I simply can't find where the configurations are different which would hide the GNOME's options.
The system on the Virtual Machine was built from scratch and both systems are xenial, amd64. I thought the options would appear automatically. Have I done something wrong when configuring the system inside the Virtual Machine? Is there a package I should install or reconfigure to make all the configuration programs to appear?
Thank you.