Index: xserver-common/X11/Xsession.d/89xTs_Calibrate_xinput_calibrator
===================================================================
--- xserver-common/X11/Xsession.d/89xTs_Calibrate_xinput_calibrator	(revision 0)
+++ xserver-common/X11/Xsession.d/89xTs_Calibrate_xinput_calibrator	(revision 0)
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+if [ -e /usr/bin/xinput_calibrator_once.sh ] ; then
+  if [ -e /etc/pointercal.xinput ] ; then
+    if [ -e /usr/bin/fsoraw ] ; then
+      # because ts tap to unblank will be used as first calibration click and then store invalid calibration
+      fsoraw -fr CPU,Display -- /usr/bin/xinput_calibrator_once.sh
+    else
+      /usr/bin/xinput_calibrator_once.sh
+    fi
+  fi
+fi