Index: sysprof-1.0.9/sysprof.c
===================================================================
--- sysprof-1.0.9.orig/sysprof.c
+++ sysprof-1.0.9/sysprof.c
@@ -543,32 +543,67 @@ on_start_toggled (GtkWidget *widget, gpo
 
     if (app->input_fd == -1)
     {
-	int fd;
 
-	fd = open ("/proc/sysprof-trace", O_RDONLY);
-	if (fd < 0)
-	{
-	    load_module();
-
-	    fd = open ("/proc/sysprof-trace", O_RDONLY);
-
-	    if (fd < 0)
-	    {
-		sorry (app->main_window,
-		       "Can't open /proc/sysprof-trace. You need to insert\n"
-		       "the sysprof kernel module. Run\n"
-		       "\n"
-		       "       modprobe sysprof-module\n"
-		       "\n"
-		       "as root.");
-		
-		update_sensitivity (app);
-		return;
-	    }
-	}
+        // Check for kernel module existence
+        gchar * modules_path;
+        gchar * standard_output;
+        gchar * standard_error;
+        int exit_status = -1;
+        if (g_spawn_command_line_sync ("/bin/uname -r",
+                    &standard_output, &standard_error,
+                    &exit_status,
+                    NULL))
+        {
+            g_strchomp( standard_output );
+            gchar * module_path;
+            module_path = g_strdup_printf( "/lib/modules/%s/extra/sysprof-module.ko", standard_output );
+
+            if ( ! g_file_test( module_path, G_FILE_TEST_EXISTS ))
+            {
+                sorry (app->main_window,
+                        "Can not find sysprof kernel module in:\n\n"
+                        "       %s\n\n"
+                        "Please see:\n"
+                        "\n"
+                        "       %s/README.Fedora\n"
+                        "\n"
+                        "for more info about module installation.", module_path, PACKAGE_DOCDIR );
+                g_free( module_path );
+                update_sensitivity (app);
+                return;
+
+            }
+            g_free (standard_output);
+            g_free (standard_error);
+            g_free( module_path );
+        }
+
+        int fd;
+
+        fd = open ("/proc/sysprof-trace", O_RDONLY);
+        if (fd < 0)
+        {
+            load_module();
+
+            fd = open ("/proc/sysprof-trace", O_RDONLY);
+
+            if (fd < 0)
+            {
+                sorry (app->main_window,
+                        "Can't open /proc/sysprof-trace. You need to insert\n"
+                        "the sysprof kernel module. Run\n"
+                        "\n"
+                        "       modprobe sysprof-module\n"
+                        "\n"
+                        "as root.");
+
+                update_sensitivity (app);
+                return;
+            }
+        }
 
-	app->input_fd = fd;
-	fd_add_watch (app->input_fd, app);
+        app->input_fd = fd;
+        fd_add_watch (app->input_fd, app);
     }
     
     fd_set_read_callback (app->input_fd, on_read);