diff -aruN alsa-lib-1.0.27.2/src/pcm/pcm_dmix.c alsa-lib-1.0.27.2.N/src/pcm/pcm_dmix.c
--- alsa-lib-1.0.27.2/src/pcm/pcm_dmix.c	2017-08-14 10:28:26.855071601 -0700
+++ alsa-lib-1.0.27.2.N/src/pcm/pcm_dmix.c	2017-08-14 10:36:01.205629277 -0700
@@ -769,6 +769,7 @@
 static int snd_pcm_dmix_close(snd_pcm_t *pcm)
 {
 	snd_pcm_direct_t *dmix = pcm->private_data;
+	SNDERR("Closing instance %x", pcm);
 
 	if (dmix->timer)
 		snd_timer_close(dmix->timer);
@@ -787,6 +788,7 @@
 	free(dmix->bindings);
 	pcm->private_data = NULL;
 	free(dmix);
+	SNDERR("Closed instance %x", pcm);
 	return 0;
 }
 
@@ -1017,6 +1019,7 @@
 	if (first_instance) {
 		/* recursion is already checked in
 		   snd_pcm_direct_get_slave_ipc_offset() */
+		SNDERR("Opening first instance");
 		ret = snd_pcm_open_slave(&spcm, root, sconf, stream,
 					 mode | SND_PCM_NONBLOCK, NULL);
 		if (ret < 0) {
@@ -1050,6 +1053,7 @@
 
 		dmix->shmptr->type = spcm->type;
 	} else {
+		SNDERR("Opening non-first instance");
 		if (dmix->shmptr->use_server) {
 			/* up semaphore to avoid deadlock */
 			snd_pcm_direct_semaphore_up(dmix, DIRECT_IPC_SEM_CLIENT);
@@ -1123,6 +1127,7 @@
 	snd_pcm_direct_semaphore_up(dmix, DIRECT_IPC_SEM_CLIENT);
 
 	*pcmp = pcm;
+	SNDERR("Opened instance %x", pcm);
 	return 0;
 	
  _err: