diff -Nru initramfs-tools-0.103ubuntu4.10/debian/changelog initramfs-tools-0.103ubuntu4.11/debian/changelog
--- initramfs-tools-0.103ubuntu4.10/debian/changelog	2017-12-05 19:29:04.000000000 +0000
+++ initramfs-tools-0.103ubuntu4.11/debian/changelog	2018-05-16 12:47:01.000000000 +0000
@@ -1,3 +1,9 @@
+initramfs-tools (0.103ubuntu4.11) trusty; urgency=medium
+
+  * hook-functions: handle md arrays with nvme disk members. (LP: #1771557)
+
+ -- Guilherme G. Piccoli <gpiccoli@canonical.com>  Wed, 16 May 2018 09:47:01 -0300
+
 initramfs-tools (0.103ubuntu4.10) trusty; urgency=medium
 
   * mkinitramfs: Delete or report temporary files in /var/tmp/ on failure.
diff -Nru initramfs-tools-0.103ubuntu4.10/hook-functions initramfs-tools-0.103ubuntu4.11/hook-functions
--- initramfs-tools-0.103ubuntu4.10/hook-functions	2017-08-30 10:10:40.000000000 +0000
+++ initramfs-tools-0.103ubuntu4.11/hook-functions	2018-05-16 12:47:01.000000000 +0000
@@ -321,17 +321,17 @@
 		root=${root#/dev/md/}
 		# strip partion number
 		root=${root%%p[0-9]*}
-		# drop the partition number only for sdX and hdX devices
+		# drop the partition number for sdX, hdX and nvmeXnYpZ devices
 		# and keep it for other devices like loop#, dm-# devices
-		block=$(sed -ne 's/multipath/[/' -e 's/linear/[/' -e 's/raid[0-9][0-9]*/[/' -e 's/\([hs]d[a-z][a-z]*\)[0-9][0-9]*/\1/g' -e '/^md'$root' :/s/^[^[]*\[ \([^\[]*\)\[.*$/\1/p' </proc/mdstat)
+		block=$(sed -ne 's/multipath/[/' -e 's/linear/[/' -e 's/raid[0-9][0-9]*/[/' -e 's/\([hs]d[a-z][a-z]*\)[0-9][0-9]*/\1/g' -e 's/\(nvme[0-9][0-9]*n[0-9][0-9]*\)p[0-9]*/\1/g' -e '/^md'$root' :/s/^[^[]*\[ \([^\[]*\)\[.*$/\1/p' </proc/mdstat)
 	# md root /dev/mdX
 	elif [ "${root#/dev/md}" != "${root}" ]; then
 		root=${root#/dev/md}
 		# strip partion number
 		root=${root%%p[0-9]*}
-		# drop the partition number only for sdX and hdX devices
+		# drop the partition number for sdX, hdX and nvmeXnYpZ devices
 		# and keep it for other devices like loop#, dm-# devices
-		block=$(sed -ne 's/multipath/[/' -e 's/linear/[/' -e 's/raid[0-9][0-9]*/[/' -e 's/\([hs]d[a-z][a-z]*\)[0-9][0-9]*/\1/g' -e '/^md'$root' :/s/^[^[]*\[ \([^\[]*\)\[.*$/\1/p' </proc/mdstat)
+		block=$(sed -ne 's/multipath/[/' -e 's/linear/[/' -e 's/raid[0-9][0-9]*/[/' -e 's/\([hs]d[a-z][a-z]*\)[0-9][0-9]*/\1/g' -e 's/\(nvme[0-9][0-9]*n[0-9][0-9]*\)p[0-9]*/\1/g' -e '/^md'$root' :/s/^[^[]*\[ \([^\[]*\)\[.*$/\1/p' </proc/mdstat)
 	# cciss device
 	elif [ "${root#/dev/cciss/}" != "${root}" ]; then
 		block=${root#/dev/cciss/*}