Index: /trunk/src/VBox/Devices/Audio/DrvAudio.cpp
===================================================================
--- /trunk/src/VBox/Devices/Audio/DrvAudio.cpp	(revision 88558)
+++ /trunk/src/VBox/Devices/Audio/DrvAudio.cpp	(revision 88559)
@@ -3786,4 +3786,19 @@
                                   N_("The host audio driver does not implement PDMIHOSTAUDIO!"));
         }
+    }
+
+    /*
+     * Do some status code simplification for beningn host driver init failures.
+     * The device above us will then replace it will the Null driver.
+     */
+    /** @todo Do the Null driver replacment here, then we don't have to duplicate
+     *        it in 3+ devices! */
+    if (   rc == VERR_MODULE_NOT_FOUND
+        || rc == VERR_SYMBOL_NOT_FOUND
+        || rc == VERR_FILE_NOT_FOUND
+        || rc == VERR_PATH_NOT_FOUND)
+    {
+        LogRel(("Audio: %Rrc -> VERR_AUDIO_BACKEND_INIT_FAILED\n", rc));
+        rc = VERR_AUDIO_BACKEND_INIT_FAILED;
     }