diff -up cups-2.2.6/scheduler/main.c.systemd-socket cups-2.2.6/scheduler/main.c

--- cups-2.2.6/scheduler/main.c.systemd-socket	2018-09-19 12:38:00.602843492 +0200

+++ cups-2.2.6/scheduler/main.c	2018-09-19 12:38:00.629843255 +0200

@@ -691,8 +691,16 @@ main(int  argc,				/* I - Number of comm

 #ifdef HAVE_ONDEMAND

   if (OnDemand)

+  {

     cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL, "Scheduler started on demand.");

-  else

+# ifdef HAVE_SYSTEMD

+    sd_notifyf(0, "READY=1\n"

+               "STATUS=Scheduler is running...\n"

+               "MAINPID=%lu",

+               (unsigned long) getpid());

+# endif /* HAVE_SYSTEMD */

+  } else

+

 #endif /* HAVE_ONDEMAND */

   if (fg)

     cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL, "Scheduler started in foreground.");

diff -up cups-2.2.6/scheduler/org.cups.cupsd.path.in.systemd-socket cups-2.2.6/scheduler/org.cups.cupsd.path.in

--- cups-2.2.6/scheduler/org.cups.cupsd.path.in.systemd-socket	2017-11-01 15:57:53.000000000 +0100

+++ cups-2.2.6/scheduler/org.cups.cupsd.path.in	2018-09-19 12:38:00.630843246 +0200

@@ -1,6 +1,6 @@

 [Unit]

 Description=CUPS Scheduler

-PartOf=org.cups.cupsd.service

+PartOf=cups.service

 [Path]

 PathExists=@CUPS_CACHEDIR@/org.cups.cupsd

diff -up cups-2.2.6/scheduler/org.cups.cupsd.service.in.systemd-socket cups-2.2.6/scheduler/org.cups.cupsd.service.in

--- cups-2.2.6/scheduler/org.cups.cupsd.service.in.systemd-socket	2018-09-19 12:38:00.630843246 +0200

+++ cups-2.2.6/scheduler/org.cups.cupsd.service.in	2018-09-19 12:39:39.550975966 +0200

@@ -1,11 +1,13 @@

 [Unit]

 Description=CUPS Scheduler

 Documentation=man:cupsd(8)

+After=network.target

 [Service]

 ExecStart=@sbindir@/cupsd -l

-Type=simple

+Type=notify

+Restart=on-failure

 [Install]

-Also=org.cups.cupsd.socket org.cups.cupsd.path

+Also=cups.socket cups.path

 WantedBy=printer.target

diff -up cups-2.2.6/scheduler/org.cups.cupsd.socket.in.systemd-socket cups-2.2.6/scheduler/org.cups.cupsd.socket.in

--- cups-2.2.6/scheduler/org.cups.cupsd.socket.in.systemd-socket	2017-11-01 15:57:53.000000000 +0100

+++ cups-2.2.6/scheduler/org.cups.cupsd.socket.in	2018-09-19 12:38:00.630843246 +0200

@@ -1,6 +1,6 @@

 [Unit]

 Description=CUPS Scheduler

-PartOf=org.cups.cupsd.service

+PartOf=cups.service

 [Socket]

 ListenStream=@CUPS_DEFAULT_DOMAINSOCKET@

diff -up cups-2.2.6/scheduler/org.cups.cups-lpd.socket.systemd-socket cups-2.2.6/scheduler/org.cups.cups-lpd.socket

--- cups-2.2.6/scheduler/org.cups.cups-lpd.socket.systemd-socket	2017-11-01 15:57:53.000000000 +0100

+++ cups-2.2.6/scheduler/org.cups.cups-lpd.socket	2018-09-19 12:38:00.630843246 +0200

@@ -1,6 +1,6 @@

 [Unit]

 Description=CUPS LPD Server Socket

-PartOf=org.cups.cups-lpd.service

+PartOf=cups-lpd.service

 [Socket]

 ListenStream=515