diff -Nru cups-2.2.12/debian/changelog cups-2.2.12/debian/changelog
--- cups-2.2.12/debian/changelog	2019-08-30 16:19:57.000000000 +0000
+++ cups-2.2.12/debian/changelog	2019-09-05 17:03:01.000000000 +0000
@@ -1,3 +1,10 @@
+cups (2.2.12-2ubuntu1) eoan; urgency=medium
+
+  * Add workaround for systemd's lack of true launch-on-demand
+    support (Upstream issue #5640).
+
+ -- Till Kamppeter <till.kamppeter@gmail.com>  Fri,  5 Sep 2019 19:03:01 +0200
+
 cups (2.2.12-2) unstable; urgency=medium
 
   [ Helge Kreutzmann ]
diff -Nru cups-2.2.12/debian/patches/series cups-2.2.12/debian/patches/series
--- cups-2.2.12/debian/patches/series	2019-08-30 16:19:57.000000000 +0000
+++ cups-2.2.12/debian/patches/series	2019-09-05 17:00:19.000000000 +0000
@@ -33,3 +33,4 @@
 debianize_cups-config.patch
 0034-Build-mantohtml-with-the-build-architecture-compiler.patch
 manpage-translations.patch
+workaround-for-systemds-lack-of-true-launch-on-demand.patch
diff -Nru cups-2.2.12/debian/patches/workaround-for-systemds-lack-of-true-launch-on-demand.patch cups-2.2.12/debian/patches/workaround-for-systemds-lack-of-true-launch-on-demand.patch
--- cups-2.2.12/debian/patches/workaround-for-systemds-lack-of-true-launch-on-demand.patch	1970-01-01 00:00:00.000000000 +0000
+++ cups-2.2.12/debian/patches/workaround-for-systemds-lack-of-true-launch-on-demand.patch	2019-09-05 17:00:54.000000000 +0000
@@ -0,0 +1,12 @@
+--- a/scheduler/main.c
++++ b/scheduler/main.c
+@@ -750,7 +750,9 @@
+ #ifdef HAVE_ONDEMAND
+ 	if (OnDemand)
+ 	{
++#  ifndef HAVE_SYSTEMD /* Issue #5640: systemd doesn't actually support launch-on-demand services, need to fake it */
+ 	  stop_scheduler = 1;
++#  endif /* HAVE_SYSTEMD */
+ 	  break;
+ 	}
+ #endif /* HAVE_ONDEMAND */