--- interfaces/emacs/misc/bookmode.el.orig	2008-02-07 12:42:18.008472937 +0000
+++ interfaces/emacs/misc/bookmode.el	2008-02-07 12:43:02.531010132 +0000
@@ -680,7 +680,7 @@
 		
 		  (and tem
 		       (list (concat "View "(nth 1 tem))
-			     'call-process  "ghostview" nil nil nil
+			     'call-process  "xdg-open" nil nil nil
 			     (expand-file-name(nth 1 tem))
 			     ))
 		  (list "Cancel")
@@ -705,7 +705,7 @@
 			 (concat
 			  (cond ((looking-at "%PS") "")
 				(t "gzip -dc | "))
-			  "ghostview -")
+			  "xdg-open -")
 			 
 	)))
 	 
--- interfaces/xmaxima/Tkmaxima/Constants.tcl.orig	2008-02-07 12:42:47.294141832 +0000
+++ interfaces/xmaxima/Tkmaxima/Constants.tcl	2008-02-07 12:43:02.539010587 +0000
@@ -143,9 +143,9 @@
     image/gif  netmath
     image/png  netmath
     image/jpeg netmath
-    application/postscript "ghostview -safer %s"
-    application/pdf "acroread %s"
-    application/x-dvi "xdvi %s"
+    application/postscript "xdg-open -safer %s"
+    application/pdf "xdg-open %s"
+    application/x-dvi "xdg-open %s"
 }
 set maxima_priv(imagecounter) 0