1. run X gui emacs
2. install ~xclip~ package
3. ~M-x xclip-mode~
4. ~M-x server-start~
5. ~(kill-new "adaf")~
6. run ~emacsclient -nw~ from terminal.
7. ~(kill-new "sss")~

Emacs freezes.

Configuration used:
(setq save-interprogram-paste-before-kill t)
(require 'package)
(let* ((no-ssl (and (memq system-type '(windows-nt ms-dos))   ;; add melpa
repo: either through ssl or non-ssl.
                    (not (gnutls-available-p))))
       (url (concat (if no-ssl "http" "https") "://melpa.org/packages/")))
  (add-to-list 'package-archives (cons "melpa" url) t))
(package-initialize)
(custom-set-variables
 ;; custom-set-variables was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 '(package-selected-packages (quote (xclip))))
(custom-set-faces
 ;; custom-set-faces was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 )


`save-interprogram-paste-before-kill' makes extra action: current value X
clipboard is stored to kill-ring, before new value is put there.
I use xclip commandline tool to talk to X clipboard from emacs.

In GNU Emacs 25.3.1 (x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2018-04-28 built on wla-64
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description:    Ubuntu 18.04.2 LTS

Configured using:
 'configure --with-xwidgets --with-x-toolkit=gtk3'

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND GPM DBUS GSETTINGS NOTIFY GNUTLS
LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11
XWIDGETS

Important settings:
  value of $LC_MONETARY: pl_PL.UTF-8
  value of $LC_NUMERIC: pl_PL.UTF-8
  value of $LC_TIME: pl_PL.UTF-8
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  xclip-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Xclip mode enabled
You can run the command ‘xclip-mode’ with M-x xc RET
Xclip mode enabled
user-error: Beginning of history; no preceding item
"aaa"
When done with this frame, type C-x 5 0
Waiting for process to die...done
Quit
funcall-interactively: End of buffer

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message dired format-spec rfc822 mml
mml-sec password-cache epg gnus-util mm-decode mm-bodies mm-encode
mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047
rfc2045 ietf-drums mm-util help-fns mail-prsvr mail-utils term/xterm
xterm server cus-start cus-load xclip finder-inf package epg-config seq
byte-opt gv bytecomp byte-compile cl-extra help-mode easymenu cconv
cl-loaddefs pcase cl-lib time-date mule-util tooltip eldoc electric
uniquify ediff-hook vc-hooks lisp-float-type mwheel x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list newcomment elisp-mode lisp-mode prog-mode register page
menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core frame cl-generic cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms
cp51932 hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese charscript case-table epa-hook jka-cmpr-hook help
simple abbrev minibuffer cl-preloaded nadvice loaddefs button faces
cus-face macroexp files text-properties overlay sha1 md5 base64 format
env code-pages mule custom widget hashtable-print-readable backquote
dbusbind inotify dynamic-setting system-font-setting font-render-setting
xwidget-internal move-toolbar gtk x-toolkit x multi-tty
make-network-process emacs)

Memory information:
((conses 16 223260 11365)
 (symbols 48 26193 0)
 (miscs 40 103 93)
 (strings 32 58202 20290)
 (string-bytes 1 1400022)
 (vectors 16 19159)
 (vector-slots 8 536861 4288)
 (floats 8 202 564)
 (intervals 56 246 0)
 (buffers 976 19))