diff -Nru kexec-tools-2.0.10/debian/changelog kexec-tools-2.0.10/debian/changelog
--- kexec-tools-2.0.10/debian/changelog	2017-09-12 13:47:10.000000000 +0000
+++ kexec-tools-2.0.10/debian/changelog	2018-04-13 23:50:27.000000000 +0000
@@ -1,3 +1,10 @@
+kexec-tools (1:2.0.10-1ubuntu2.5) xenial; urgency=medium
+
+  * The default crashkernel parameter didn't work on any known arm64
+    systems, set a reasonable default instead (LP: #1763532).
+
+ -- dann frazier <dann.frazier@canonical.com>  Fri, 13 Apr 2018 17:50:27 -0600
+
 kexec-tools (1:2.0.10-1ubuntu2.4) xenial; urgency=medium
 
   [Marcelo Henrique Cerri]
diff -Nru kexec-tools-2.0.10/debian/kexec-tools.grub.arm64 kexec-tools-2.0.10/debian/kexec-tools.grub.arm64
--- kexec-tools-2.0.10/debian/kexec-tools.grub.arm64	1970-01-01 00:00:00.000000000 +0000
+++ kexec-tools-2.0.10/debian/kexec-tools.grub.arm64	2018-04-11 22:02:26.000000000 +0000
@@ -0,0 +1 @@
+GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M"
diff -Nru kexec-tools-2.0.10/debian/rules kexec-tools-2.0.10/debian/rules
--- kexec-tools-2.0.10/debian/rules	2017-06-23 18:27:52.000000000 +0000
+++ kexec-tools-2.0.10/debian/rules	2018-04-11 22:06:58.000000000 +0000
@@ -68,8 +68,12 @@
 	# Add here commands to install the package into debian/tmp.
 	$(MAKE) install DESTDIR=$(CURDIR)/debian/kexec-tools
 ifneq (,$(filter $(DEB_HOST_ARCH),i386 amd64 powerpc ppc64 ppc64el ia64 arm64))
-	install -m644 debian/kexec-tools.grub \
-		debian/kexec-tools/etc/default/grub.d/kexec-tools.cfg
+	[ ! -f debian/kexec-tools.grub.$(DEB_HOST_ARCH) ] || \
+		install -m644 debian/kexec-tools.grub.$(DEB_HOST_ARCH) \
+			debian/kexec-tools/etc/default/grub.d/kexec-tools.cfg
+	[ -f debian/kexec-tools.grub.$(DEB_HOST_ARCH) ] || \
+		install -m644 debian/kexec-tools.grub \
+			debian/kexec-tools/etc/default/grub.d/kexec-tools.cfg
 endif
 ifeq (,$(findstring nostrip,$(DEB_BUILD_OPTIONS)))
 	[ ! -f $(CURDIR)/debian/kexec-tools/usr/lib/kexec-tools-testing/kexec_test.static ] || strip $(CURDIR)/debian/kexec-tools/usr/lib/kexec-tools-testing/kexec_test.static