Can't restart KDE Plasma from a TTY

[NaN]

you can look at this if it helps your case. I have personally tried all the commands from tty2 and it works for me.

Just remember to startx in tty1.

How to kill all processes/restart kde if display driver crashes?

Since the op is asking for killing the display server you can look for Xorg server pid with ps -H -t /dev/tty1 and then kill it with kill -SIGKILL <pid-obtained> to restart the server startx this would bring up the sddm login screen. However this isn't what you probably need as simply restarting the plasmashell or kwin should do the job. You should start testing with the less destructive plasmashell replace. you can set this command as a keyboard shortcut since you mentioned your keyboard…