diff --git a/lib/cache/lvmetad.c b/lib/cache/lvmetad.c
index 721c4a29b..0545aff28 100644
--- a/lib/cache/lvmetad.c
+++ b/lib/cache/lvmetad.c
@@ -37,6 +37,70 @@ static struct cmd_context *_lvmetad_cmd = NULL;
 
 static struct volume_group *lvmetad_pvscan_vg(struct cmd_context *cmd, struct volume_group *vg);
 
+static int _log_debug_inequality(struct dm_config_node *a, struct dm_config_node *b)
+{
+	int result = 0;
+	int final_result = 0;
+
+	if (a->v && b->v) {
+		result = compare_value(a->v, b->v);
+		if (result) {
+			struct dm_config_value *av = a->v;
+			struct dm_config_value *bv = b->v;
+
+			if (!strcmp(a->key, b->key)) {
+				if (a->v->type == DM_CFG_STRING && b->v->type == DM_CFG_STRING)
+					log_debug_lvmetad("VG metadata inequality at %s / %s: %s / %s",
+							  a->key, b->key, av->v.str, bv->v.str);
+				else if (a->v->type == DM_CFG_INT && b->v->type == DM_CFG_INT)
+					log_debug_lvmetad("VG metadata inequality at %s / %s: %li / %li",
+							  a->key, b->key, (int64_t)av->v.i, (int64_t)bv->v.i);
+				else
+					log_debug_lvmetad("VG metadata inequality at %s / %s: type %d / type %d",
+							  a->key, b->key, av->type, bv->type);
+			} else {
+				log_debug_lvmetad("VG metadata inequality at %s / %s", a->key, b->key);
+			}
+			final_result = result;
+		}
+	}
+
+	if (a->v && !b->v) {
+		log_debug_lvmetad("VG metadata inequality at %s / %s", a->key, b->key);
+		final_result = 1;
+	}
+
+	if (!a->v && b->v) {
+		log_debug_lvmetad("VG metadata inequality at %s / %s", a->key, b->key);
+		final_result = -1;
+	}
+
+	if (a->child && b->child) {
+		result = _log_debug_inequality(a->child, b->child);
+		if (result)
+			final_result = result;
+	}
+
+	if (a->sib && b->sib) {
+		result = _log_debug_inequality(a->sib, b->sib);
+		if (result)
+			final_result = result;
+	}
+	
+
+	if (a->sib && !b->sib) {
+		log_debug_lvmetad("VG metadata inequality at %s / %s", a->key, b->key);
+		final_result = 1;
+	}
+
+	if (!a->sib && b->sib) {
+		log_debug_lvmetad("VG metadata inequality at %s / %s", a->key, b->key);
+		final_result = -1;
+	}
+
+	return final_result;
+}
+
 void lvmetad_disconnect(void)
 {
 	if (_lvmetad_connected)
@@ -1136,6 +1200,7 @@ static struct volume_group *lvmetad_pvscan_vg(struct cmd_context *cmd, struct vo
 	struct format_instance *fid;
 	struct format_instance_ctx fic = { .type = 0 };
 	struct _lvmetad_pvscan_baton baton;
+	struct device *save_dev = NULL;
 
 	dm_list_iterate_items(pvl, &vg->pvs) {
 		/* missing pv */
@@ -1191,9 +1256,12 @@ static struct volume_group *lvmetad_pvscan_vg(struct cmd_context *cmd, struct vo
 
 		if (!vgmeta_ret) {
 			vgmeta_ret = vgmeta;
+			save_dev = pvl->pv->dev;
 		} else {
 			if (compare_config(vgmeta_ret->root, vgmeta->root)) {
-				log_error("VG metadata comparison failed");
+				log_error("VG %s metadata comparison failed for device %s vs %s",
+					  vg->name, dev_name(pvl->pv->dev), save_dev ? dev_name(save_dev) : "none");
+				_log_debug_inequality(vgmeta_ret->root, vgmeta->root);
 				dm_config_destroy(vgmeta);
 				dm_config_destroy(vgmeta_ret);
 				release_vg(baton.vg);
diff --git a/libdaemon/client/config-util.c b/libdaemon/client/config-util.c
index 023257e2f..ec5ea98d6 100644
--- a/libdaemon/client/config-util.c
+++ b/libdaemon/client/config-util.c
@@ -289,7 +289,7 @@ static int close_enough(double d1, double d2)
 	return fabs(d1 - d2) < DBL_EPSILON;
 }
 
-static int compare_value(struct dm_config_value *a, struct dm_config_value *b)
+int compare_value(struct dm_config_value *a, struct dm_config_value *b)
 {
 	int r = 0;
 
diff --git a/libdaemon/client/config-util.h b/libdaemon/client/config-util.h
index 0e7de7ead..c56c26801 100644
--- a/libdaemon/client/config-util.h
+++ b/libdaemon/client/config-util.h
@@ -42,6 +42,7 @@ struct dm_config_node *make_config_node(struct dm_config_tree *cft,
 					struct dm_config_node *parent,
 					struct dm_config_node *pre_sib);
 
+int compare_value(struct dm_config_value *a, struct dm_config_value *b);
 int compare_config(struct dm_config_node *a, struct dm_config_node *b);
 
 struct dm_config_node *make_text_node(struct dm_config_tree *cft,