Index: uspace/lib/c/generic/devman.c
===================================================================
--- uspace/lib/c/generic/devman.c	(revision 93ad49a84b4c98526fa998394274bbd6c68b4f7d)
+++ uspace/lib/c/generic/devman.c	(revision c22531fc62cd27d622d0595337655d0ea0e4fbc1)
@@ -89,5 +89,5 @@
 			if (devman_driver_block_sess == NULL)
 				devman_driver_block_sess =
-				    service_connect_blocking(EXCHANGE_SERIALIZE,
+				    service_connect_blocking(EXCHANGE_PARALLEL,
 				    SERVICE_DEVMAN, DEVMAN_DRIVER, 0);
 		}
@@ -138,5 +138,5 @@
 		if (devman_driver_sess == NULL)
 			devman_driver_sess =
-			    service_connect(EXCHANGE_SERIALIZE, SERVICE_DEVMAN,
+			    service_connect(EXCHANGE_PARALLEL, SERVICE_DEVMAN,
 			    DEVMAN_DRIVER, 0);
 		
Index: uspace/lib/c/generic/ns.c
===================================================================
--- uspace/lib/c/generic/ns.c	(revision 93ad49a84b4c98526fa998394274bbd6c68b4f7d)
+++ uspace/lib/c/generic/ns.c	(revision c22531fc62cd27d622d0595337655d0ea0e4fbc1)
@@ -74,4 +74,11 @@
 	async_exchange_end(exch);
 	
+	/*
+	 * FIXME Ugly hack to work around limitation of implementing
+	 * parallel exchanges using multiple connections. Shift out
+	 * first argument for non-initial connections.
+	 */
+	async_sess_args_set(sess, arg2, arg3, 0);
+	
 	return sess;
 }