--- a/.xinitrc	Sun Jul 08 15:24:33 2012 +0300
+++ b/.xinitrc	Sun Jul 08 19:23:11 2012 +0300
@@ -21,7 +21,8 @@
     xmodmap ~/.xmodmaprc
   fi
   xsetroot -gray
-  fvwm &
+  # To debug FvwmM4 add "-debug" after "FvwmM4".
+  fvwm -cmd "Module FvwmM4 -m4-prefix -m4-prefix-defines $HOME/.fvwm/config" &
 fi
 
 # Last command.