I am unfamiliar with emacs, but following your message I decided to give a try.
I first found the latest released version is 27.1. At first, I was not using --enable-kvm with qemu-system-i386, but because emacs is relatively big, it helps a lot. So, as root, I "wget http://ftp.gnu.org/gnu/emacs/emacs-27.1.tar.gz did "tar xvzf emacs-27.1.tar.gz", cd emacs-27.1 apt-get install ncurses-dev ./configure --with-x-toolkit=no --without-all make make install then "emacs" works when doing emacs-client, it was saying I needed to start emacs server... did read: https://www.emacswiki.org/emacs/EmacsAsDaemon pidof emacs kill -9 [for each pid of emacs] because I had done some other things before emacs --daemon after that I can: emacsclient allo.txt Ctrl-X Ctrl-C to permanently quit emacsclient -e '(kill-emacs)' ... that kill the emacs in --daemon mode after that: emacsclient allo2.txt give me an error message quite similar to your but without: Invalid socket owner so it could be specific to futur version 28.
