diff -Nru grub2-2.02~beta2/debian/changelog grub2-2.02~beta2/debian/changelog
--- grub2-2.02~beta2/debian/changelog	2016-06-08 12:16:40.000000000 -0300
+++ grub2-2.02~beta2/debian/changelog	2016-07-26 12:37:48.000000000 -0300
@@ -1,3 +1,10 @@
+grub2 (2.02~beta2-36ubuntu3.1powernvosprober1) UNRELEASED; urgency=medium
+
+  * Disable os-prober for ppc64el on the PowerNV platform, to reduce the
+    number of entries/clutter from other OSes in Petitboot (LP: #1447500)
+
+ -- Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>  Tue, 26 Jul 2016 12:36:44 -0300
+
 grub2 (2.02~beta2-36ubuntu3.1) xenial; urgency=medium
 
   * debian/postinst.in: replace setup_mok_validation with a call to
diff -Nru grub2-2.02~beta2/debian/postinst.in grub2-2.02~beta2/debian/postinst.in
--- grub2-2.02~beta2/debian/postinst.in	2016-05-20 16:02:55.000000000 -0300
+++ grub2-2.02~beta2/debian/postinst.in	2016-07-26 12:35:11.000000000 -0300
@@ -373,6 +373,15 @@
           sed -i -e 's/^GRUB_HIDDEN_TIMEOUT=/#&/' "$tmp_default_grub"
         fi
       ;;
+      grub-ieee1275)
+        if grep ^platform /proc/cpuinfo | grep -q PowerNV; then
+		cat <<-EOF >>"$tmp_default_grub"
+
+		# Disable os-prober for ppc64el on the PowerNV platform (for Petitboot)
+		GRUB_DISABLE_OS_PROBER=true
+		EOF
+        fi
+        ;;
     esac
 
     ucf --three-way --debconf-ok --sum-file=/usr/share/grub/default/grub.md5sum ${tmp_default_grub} /etc/default/grub