--- a/.emacs-my	Mon Jun 29 11:53:35 2009 +0300
+++ b/.emacs-my	Mon Jun 29 14:59:43 2009 +0300
@@ -149,6 +149,10 @@
 (setq pc-select-selection-keys-only t)
 (pc-selection-mode 1)
 
+(when (eq window-system 'x)
+  (setq x-select-enable-clipboard t)    ; from Emacs 21.2.1 and newer
+  )
+
 ;; ----------------------------------------------------------------------
 ;; line
 (if window-system