For more about lbxproxy, see:
http://www.xfree86.org/4.3.0/lbxproxy.1.html
+5) If copying and killing is slow, try to disable the interaction with the
+ native system's clipboard by adding these lines to your .emacs file:
+ (setq interprogram-cut-function nil)
+ (setq interprogram-paste-function nil)
+
*** Emacs gives the error, Couldn't find per display information.
This can result if the X server runs out of memory because Emacs uses