diff -Nru systemd-229/debian/changelog systemd-229/debian/changelog
--- systemd-229/debian/changelog	2017-10-27 17:43:14.000000000 +0800
+++ systemd-229/debian/changelog	2017-12-18 17:02:47.000000000 +0800
@@ -1,3 +1,9 @@
+systemd (229-4ubuntu21oem1) xenial; urgency=medium
+
+  * hwdb: add key mapping for 0x100150 to F20 for dell-wmi.(LP: #1738153)
+
+ -- Alex Tu <alex.tu@canonical.com>  Mon, 18 Dec 2017 16:41:15 +0800
+
 systemd (229-4ubuntu21) xenial; urgency=medium
 
   * networkd: do not uncoditionally apply NOARP.
diff -Nru systemd-229/debian/patches/0001-hwdb-add-key-mapping-for-0x100150-to-F20-for-dell-wm.patch systemd-229/debian/patches/0001-hwdb-add-key-mapping-for-0x100150-to-F20-for-dell-wm.patch
--- systemd-229/debian/patches/0001-hwdb-add-key-mapping-for-0x100150-to-F20-for-dell-wm.patch	1970-01-01 08:00:00.000000000 +0800
+++ systemd-229/debian/patches/0001-hwdb-add-key-mapping-for-0x100150-to-F20-for-dell-wm.patch	2017-12-18 15:45:31.000000000 +0800
@@ -0,0 +1,25 @@
+From 9fc2b06bd4f0ce4abe599ff9cf5f15fa85557052 Mon Sep 17 00:00:00 2001
+From: Alex Tu <alex.tu@canonical.com>
+Date: Mon, 18 Dec 2017 15:41:32 +0800
+Subject: [PATCH] hwdb: add key mapping for 0x100150 to F20 for dell-wmi.
+
+Signed-off-by: Alex Tu <alex.tu@canonical.com>
+---
+ hwdb/60-keyboard.hwdb | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/hwdb/60-keyboard.hwdb b/hwdb/60-keyboard.hwdb
+index 46013d3..d7a14d2 100644
+--- a/hwdb/60-keyboard.hwdb
++++ b/hwdb/60-keyboard.hwdb
+@@ -275,6 +275,7 @@ evdev:name:Dell WMI hotkeys:dmi:bvn*:bvr*:bd*:svnDell*:pnLatitude*
+ # Dell Precision microphone mute
+ evdev:name:Dell WMI hotkeys:dmi:bvn*:bvr*:bd*:svnDell*:pnPrecision*
+  KEYBOARD_KEY_150=f20                                   # Mic mute toggle, should be micmute
++ KEYBOARD_KEY_100150=f20                                   # Mic mute toggle, should be micmute
+ 
+ ###########################################################
+ # Everex
+-- 
+2.7.4
+
diff -Nru systemd-229/debian/patches/series systemd-229/debian/patches/series
--- systemd-229/debian/patches/series	2017-10-27 16:19:36.000000000 +0800
+++ systemd-229/debian/patches/series	2017-12-18 16:36:45.000000000 +0800
@@ -103,3 +103,4 @@
 udev-Don-t-kill-peer-processes-if-we-don-t-run-in-a-cgrou.patch
 Cherry-pick-subset-of-patches-to-introduce-infinity-value.patch
 debian/Ubuntu-core-in-execute-soft-fail-setting-Nice-priority-when.patch
+0001-hwdb-add-key-mapping-for-0x100150-to-F20-for-dell-wm.patch