D55531.diff
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	diff --git a/sbin/devd/devd.conf.5 b/sbin/devd/devd.conf.5
	--- a/sbin/devd/devd.conf.5
	+++ b/sbin/devd/devd.conf.5
	@@ -38,7 +38,7 @@
	.\" ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
	.\" SOFTWARE.
	.\"
	-.Dd July 9, 2025
	+.Dd February 26, 2026
	.Dt DEVD.CONF 5
	.Os
	.Sh NAME
	@@ -666,6 +666,8 @@
	Connected output device specified in
	.Pa cdev
	variable.
	+.It Li SND Ta Li CONN Ta Li NODEV Ta
	+No connected devices.
	.El
	.Pp
	.\"
	diff --git a/sbin/devd/snd.conf b/sbin/devd/snd.conf
	--- a/sbin/devd/snd.conf
	+++ b/sbin/devd/snd.conf
	@@ -24,3 +24,13 @@
	# See comment above.
	action "/usr/sbin/virtual_oss_cmd /dev/vdsp.ctl -P /dev/$cdev";
	};
	+
	+notify 0 {
	+ match "system" "SND";
	+ match "subsystem" "CONN";
	+ match "type" "NODEV";
	+
	+ # No connected devices. Disable both recording and playback to avoid
	+ # repeated virtual_oss error messages.
	+ action "/usr/sbin/virtual_oss_cmd /dev/vdsp.ctl -f /dev/null";
	+};
	diff --git a/sys/dev/sound/pcm/sound.c b/sys/dev/sound/pcm/sound.c
	--- a/sys/dev/sound/pcm/sound.c
	+++ b/sys/dev/sound/pcm/sound.c
	@@ -483,6 +483,8 @@
	snd_unit = pcm_best_unit(-1);
	if (snd_unit_auto == 0)
	snd_unit_auto = 1;
	+ if (snd_unit < 0)
	+ devctl_notify("SND", "CONN", "NODEV", NULL);
	}

	return (0);