GDM 3.28.3 and it's transition to GNOME Shell 3.28.4 in Ubuntu 18.04 - Q2

  1. An example of the 1st graphical view of Ubuntu/GNOME3 after booting up is shown here. Is this window the “GDM Greeter”? If not, what is a “GDM Greeter”? I ask this because according to “Design notes for the Greeter” given in Design notes for the Greeter, the Greeter contains both a Boot Screen and a User Chooser. The 1st graphical view of Ubuntu that I had shown contains a “User Choser” but I did not see a GNOME boot screen before this. So does the Greeter have one or two GUI?

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