--- xinit.orig/files/xdm.confd-2
+++ xinit/files/xdm.confd-2
@@ -10,4 +10,15 @@ CHECKVT=7
 # KDE-specific note: kdm is for the users of -kdeprefix and the kdm-4.3 is specified for
 # users of kdeprefix, where they can find possible versions by looking at the directories
 # in /usr/kde/. Users of KDE 3 should use kdm-3.5.
+# NOTE (2): If you want to use your custom DISPLAYMANAGER, you can specify a
+# full path to an executable.
 DISPLAYMANAGER="xdm"
+
+# If you specify a custom DISPLAYMANAGER value (one unsupported)
+# you can also specify a custom pidfile that your application is
+# supposed to use and that will be handled by start-stop-daemon
+# to properly start/restart/stop it.
+# If you don't specify any value and use an unsupported DISPLAYMANAGER
+# CUSTOM_DISPLAYMANAGER_PIDFILE will be placed into
+# /var/run/<DISPLAYMANAGER name>.pid
+# CUSTOM_DISPLAYMANAGER_PIDFILE=""
--- xinit.orig/files/xdm.initd-4
+++ xinit/files/xdm.initd-4
@@ -56,12 +56,18 @@ depend() {
 
 setup_dm() {
 	local MY_XDM="$(echo "${DISPLAYMANAGER}" | tr '[:upper:]' '[:lower:]')"
+	local MY_CUSTOM_PIDFILE="$(echo "${CUSTOM_DISPLAYMANAGER_PIDFILE}" | tr '[:upper:]' '[:lower:]')"
+	MY_CUSTOM_PIDFILE="${MY_CUSTOM_PIDFILE:-/var/run/$(basename ${MY_XDM}).pid}"
 
 	# Load our root path from profile.env
 	# Needed for kdm
 	PATH="${PATH}:$(. /etc/profile.env; echo "${ROOTPATH}")"
 
 	case "${MY_XDM}" in
+		xdm)
+			EXE=/usr/bin/xdm
+			PIDFILE=/var/run/xdm.pid
+			;;
 		kdm|kde)
 			EXE="$(which kdm)"
 			PIDFILE=/var/run/kdm.pid
@@ -88,14 +94,9 @@ setup_dm() {
 			PIDFILE=/var/run/gpe-dm.pid
 			;;
 		*)
-			EXE=
-			# Fix #65586, where MY_XDM is empty so EXE=somedir
-			[ -x "/usr/bin/${MY_XDM}" ] && [ -f "/usr/bin/${MY_XDM}" ] \
-				&& EXE="/usr/bin/${MY_XDM}"
-			if [ -z "${EXE}" ] ; then
-				EXE=/usr/bin/xdm
-				PIDFILE=/var/run/xdm.pid
-			fi
+			if [ -x "${MY_XDM}" ] && [ -f "${MY_XDM}" ]; then
+				EXE="${MY_XDM}"
+				PIDFILE="${MY_CUSTOM_PIDFILE}"
 			;;
 	esac