diff -p -up pari-2.4.3.alpha/doc/gphelp.in.orig pari-2.4.3.alpha/doc/gphelp.in
--- pari-2.4.3.alpha/doc/gphelp.in.orig	2010-11-10 18:37:29.401708007 -0200
+++ pari-2.4.3.alpha/doc/gphelp.in	2010-11-10 18:37:56.827707954 -0200
@@ -47,8 +47,8 @@ $datadir= "@datadir@";
 # no expanded material (@key@) below
 $wwwsite= "http://pari.math.u-bordeaux.fr/";
 
-$xdvi = $ENV{GPXDVI} || "xdvi";
-$xdviref = $ENV{GPXDVIREF} || "$xdvi -paper 29.7x21cm";
+$xdvi = $ENV{GPXDVI} || "xdg-open";
+$xdviref = $ENV{GPXDVIREF} || "$xdvi";
 $gzip = "gzip";
 $zcat = "$gzip -dc";
 $bzip = "bzip2";