Index: main/devicestate.c
===================================================================
--- main/devicestate.c	(Revision 312991)
+++ main/devicestate.c	(Arbeitskopie)
@@ -780,6 +780,7 @@
 		agg->in_use = 1;
 		break;
 	case AST_DEVICE_UNAVAILABLE:
+		agg->all_unavail = 1;
 		agg->all_unknown = 0;
 	case AST_DEVICE_INVALID:
 		agg->all_busy = 0;