How to disable Username-input field (StEntry) Ubuntu 20.04?

id flag

Is it possible to hide or disable the input-field for Username in the logon screen on Ubuntu 20.04 - making it "impossible" to type into the field for a period of time? Reason for this is to make it clear for the student (along with a background image) that the machine is still being configured. (See picture below for reference)

Ubuntu 20.04 Login screen Ubuntu 20.04 Login screen

I think it has something to do with the gdm3.css in the /usr/share/gnome-shell/theme/Yaru/gnome-shell-theme.gresoure.


24601 avatar
in flag
perhaps you need to explain why this is necessary. [Edit] accordingly.
N. J avatar
id flag
Is the additional comment sufficient?

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