Entering/Exiting Terminal to GUI (KDE)

[LDRCII]

I've been a user for a couple of years now, but the main thing keeping me from using Porteus as a main OS, is how many times I have to reboot.

Either the system hangs, or a program crashes plasmashell. I jump into terminal mode using Alt+f2, but when I switch back using Alt+f7 I get another terminal instead of my gui. On that terminal I get messages about the X server dying and when I type commands, it just jumps to the next line and does nothing. I typically open another terminal via Alt+f1 through 6 and just run init 3 or startx, but I feel like that just uses up computer resources and I hate having to open my windows all over again. Is there a simple way to jump into terminal without losing my session?

[burdi01]

This looks rather like what see with Xubuntu (so XFCE) 18.04.3 ...
My hunch is that things are provoked by systemd/logind ...