diff -r -u -N audio/jack/Makefile /usr/ports/audio/jack/Makefile
--- audio/jack/Makefile	2020-12-06 14:37:11.470940000 +0100
+++ /usr/ports/audio/jack/Makefile	2020-12-06 18:36:39.509511000 +0100
@@ -14,6 +14,7 @@
 
 LIB_DEPENDS=	libsndfile.so:audio/libsndfile \
 		libsamplerate.so:audio/libsamplerate \
+		libsysinfo.so:devel/libsysinfo \
 		libcelt0.so:audio/celt
 
 USES=		waf compiler:c11 pkgconfig shebangfix python:3.4+,build
@@ -28,6 +29,7 @@
 
 SHEBANG_FILES=	tools/jack_control
 SHEBANG_LANG=	python3
+USE_RC_SUBR=	jackd
 
 CONFIGURE_ARGS+=	--celt=yes --sndfile=yes --samplerate=yes
 
@@ -39,9 +41,8 @@
 ALSA_CONFIGURE_OFF=	--alsa=no
 ALSA_CONFIGURE_ON=	--alsa=yes
 
-DBUS_CONFIGURE_ON=	--dbus
+DBUS_CONFIGURE_ON=	--dbus --classic --autostart=dbus
 DBUS_LIB_DEPENDS=	libdbus-1.so:devel/dbus \
-			libsysinfo.so:devel/libsysinfo \
 			libexpat.so:textproc/expat2
 DBUS_RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}dbus>0:devel/py-dbus@${PY_FLAVOR}
 
diff -r -u -N audio/jack/files/jackd.in /usr/ports/audio/jack/files/jackd.in
--- audio/jack/files/jackd.in	1970-01-01 01:00:00.000000000 +0100
+++ /usr/ports/audio/jack/files/jackd.in	2020-12-06 17:47:00.890200000 +0100
@@ -0,0 +1,37 @@
+#!/bin/sh
+#
+# $FreeBSD: head/audio/jack/files/jackd.in 472147 2018-06-10 17:11:05Z riggs $
+#
+# PROVIDE: jackd
+# REQUIRE: LOGIN
+#
+# Add the following line to /etc/rc.conf to enable jackd:
+#
+# jackd_enable="YES"
+#
+
+: ${jackd_enable="NO"}
+: ${jackd_user="root"}
+: ${jackd_rtprio="NO"}
+: ${jackd_args="-r -doss -r44100 -p1024 -n3 -w16"}
+
+. /etc/rc.subr
+
+name=jackd
+rcvar=jackd_enable
+procname=%%PREFIX%%/bin/jackd
+start_cmd="start_jackd"
+
+start_jackd() {
+  echo "Starting ${name}."
+  if [ $jackd_rtprio = "YES" ]; then
+    local rt="rtprio 1"
+  fi
+  # log the date and parameters
+  echo -e "\n[`date`] Starting the daemon, user=$jackd_user rtprio=$jackd_rtprio args=\"$jackd_args\"" >> /var/log/${name}.log
+  # daemon(8) should be able to set the realtime priority, but it isn't
+  $rt daemon -p /var/run/${name}.pid -u "${jackd_user}" %%PREFIX%%/bin/jackd ${jackd_args}
+}
+
+load_rc_config ${name}
+run_rc_command "$1"
diff -r -u -N audio/jack/pkg-plist /usr/ports/audio/jack/pkg-plist
--- audio/jack/pkg-plist	2020-12-06 14:54:36.028124000 +0100
+++ /usr/ports/audio/jack/pkg-plist	2020-12-06 16:13:31.884336000 +0100
@@ -35,7 +35,8 @@
 bin/jack_unload
 bin/jack_wait
 bin/jack_zombie
-bin/jackdbus
+bin/jackd
+%%DBUS%%bin/jackdbus
 include/jack/control.h
 include/jack/intclient.h
 include/jack/jack.h
@@ -75,7 +76,7 @@
 lib/libjackserver.so.0
 lib/libjackserver.so.0.1.0
 libdata/pkgconfig/jack.pc
-share/dbus-1/services/org.jackaudio.service
+%%DBUS%%share/dbus-1/services/org.jackaudio.service
 share/man/man1/alsa_in.1.gz
 share/man/man1/alsa_out.1.gz
 share/man/man1/jack_bufsize.1.gz