Some additional infos about the 'minimum-vt' setting: https://manpages.debian.org/stretch/sddm/sddm.conf.5.en.html
See the section "[X11]" and the description there: ---<cite>--- MinimumVT= Minimum virtual terminal number that will be used by the first display. Virtual terminal number will increase as new displays added. Default value is 7. ---</cite>--- -- Yours sincerely Joerg Schiermeier Bielefeld / Germany