diff -up asymptote-2.25/settings.cc.settings asymptote-2.25/settings.cc
--- asymptote-2.25/settings.cc.settings	2014-04-22 16:19:51.540447535 -0400
+++ asymptote-2.25/settings.cc	2014-04-22 16:20:44.928130394 -0400
@@ -90,11 +90,11 @@ bool msdos=false;
 string HOME="HOME";
 string docdir=ASYMPTOTE_DOCDIR;
 const char pathSeparator=':';
-string defaultPSViewer="gv";
+string defaultPSViewer="evince";
 #ifdef __APPLE__
 string defaultPDFViewer="open";
 #else  
-string defaultPDFViewer="acroread";
+string defaultPDFViewer="evince";
 #endif  
 string defaultGhostscript="gs";
 string defaultGhostscriptLibrary="/usr/lib/libgs.so";