diff -Naur alsa-lib-1.1.1.orig/src/pcm/pcm_direct.c alsa-lib-1.1.1/src/pcm/pcm_direct.c
--- alsa-lib-1.1.1.orig/src/pcm/pcm_direct.c	2016-03-31 15:10:39.000000000 +0200
+++ alsa-lib-1.1.1/src/pcm/pcm_direct.c	2016-04-10 17:44:08.815456305 +0200
@@ -125,7 +125,7 @@
 		snd_pcm_direct_shm_discard(dmix);
 		return err;
 	}
-	if (first_instance) {	/* we're the first user, clear the segment */
+	if (first_instance || buf.shm_nattch == 1) {	/* we're the first user, clear the segment */
 		memset(dmix->shmptr, 0, sizeof(snd_pcm_direct_share_t));
 		if (dmix->ipc_gid >= 0) {
 			buf.shm_perm.gid = dmix->ipc_gid;