diff -p -up maxima-5.22.0/interfaces/emacs/misc/bookmode.el.orig maxima-5.22.0/interfaces/emacs/misc/bookmode.el
--- maxima-5.22.0/interfaces/emacs/misc/bookmode.el.orig	2010-08-06 21:13:29.596377181 -0300
+++ maxima-5.22.0/interfaces/emacs/misc/bookmode.el	2010-08-06 21:14:56.923377040 -0300
@@ -680,7 +680,7 @@ file")
 		
 		  (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 @@ file")
 			 (concat
 			  (cond ((looking-at "%PS") "")
 				(t "gzip -dc | "))
-			  "ghostview -")
+			  "xdg-open -")
 			 
 	)))
 	 
diff -p -up maxima-5.22.0/interfaces/xmaxima/Tkmaxima/Constants.tcl.orig maxima-5.22.0/interfaces/xmaxima/Tkmaxima/Constants.tcl
--- maxima-5.22.0/interfaces/xmaxima/Tkmaxima/Constants.tcl.orig	2010-08-06 21:14:10.801380489 -0300
+++ maxima-5.22.0/interfaces/xmaxima/Tkmaxima/Constants.tcl	2010-08-06 21:15:30.406654035 -0300
@@ -148,9 +148,9 @@ set maxima_priv(urlHandlers) {
     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