--- allegro-4.2.0/src/x/xwin.c~	2006-03-21 12:57:42.000000000 +0100
+++ allegro-4.2.0/src/x/xwin.c	2006-03-21 12:57:42.000000000 +0100
@@ -2265,6 +2265,7 @@
       XUNLOCK();
 
       do {
+         rest(1);
       } while (retrace_count == prev);
    }
    else {