diff -Nru thermald-1.7.0/debian/changelog thermald-1.7.0/debian/changelog
--- thermald-1.7.0/debian/changelog	2018-04-17 15:22:21.000000000 +0000
+++ thermald-1.7.0/debian/changelog	2018-04-20 01:08:23.000000000 +0000
@@ -1,3 +1,12 @@
+thermald (1.7.0-5ubuntu1) bionic; urgency=medium
+
+  [ Ben Caradoc-Davies ]
+  * Fix non-initialized temp_unreadable (Closes: #896132) (LP: #1765572)
+    - fixes regression caused by previous fix, initialise
+      temp_unreadable to restore temperature control.
+
+ -- Colin King <colin.king@canonical.com>  Fri, 20 Apr 2018 02:08:23 +0100
+
 thermald (1.7.0-5) unstable; urgency=medium
 
   * Don't continually re-read broken temperature sysfs file (LP: #1764320)
diff -Nru thermald-1.7.0/debian/control thermald-1.7.0/debian/control
--- thermald-1.7.0/debian/control	2018-03-06 08:49:37.000000000 +0000
+++ thermald-1.7.0/debian/control	2018-04-20 01:08:23.000000000 +0000
@@ -1,7 +1,8 @@
 Source: thermald
 Section: admin
 Priority: optional
-Maintainer: Colin King <colin.king@canonical.com>
+Maintainer: Colin King <colin.king@ubuntu.com>
+XSBC-Original-Maintainer: Colin King <colin.king@canonical.com>
 Standards-Version: 4.1.2
 Build-Depends: debhelper (>= 10), quilt, autoconf, libglib2.0-dev, libdbus-1-dev, libdbus-glib-1-dev, libxml2-dev
 Homepage: https://github.com/01org/thermal_daemon
diff -Nru thermald-1.7.0/debian/patches/0003-thermald-fix-uninitialised-member.patch thermald-1.7.0/debian/patches/0003-thermald-fix-uninitialised-member.patch
--- thermald-1.7.0/debian/patches/0003-thermald-fix-uninitialised-member.patch	1970-01-01 00:00:00.000000000 +0000
+++ thermald-1.7.0/debian/patches/0003-thermald-fix-uninitialised-member.patch	2018-04-20 01:08:23.000000000 +0000
@@ -0,0 +1,45 @@
+From: Ben Caradoc-Davies <ben@transient.nz>
+To: Debian Bug Tracking System <submit@bugs.debian.org>
+Date: Fri, 20 Apr 2018 10:51:10 +1200
+Subject: Bug#896132: thermald uninitialised member causes loss of temperature control
+
+Package: thermald
+Version: 1.7.0-5
+Severity: critical
+Tags: patch
+Justification: breaks the whole system
+
+Dear Maintainer,
+
+0002-Don-t-keep-on-reading-a-sensor-if-the-temperature-is.patch, added in
+1.7.0-5,
+introduces a new cthd_sensor data member temp_unreadable but fails to
+initialise it.
+This causes nondeterministic behaviour. If any bits of the uninitialised
+boolean are
+nonzero, it will be evaluate to true, and the sensor will be silently disabled,
+causing loss of temperature control.
+
+This bug is critical because loss of temperature control risks physical
+hardware damage.
+
+Attached patch initialises temp_unreadable to restore temperature control.
+
+Kind regards,
+Ben.
+
+---
+
+Index: thermald-1.7.0/src/thd_sensor.cpp
+===================================================================
+--- thermald-1.7.0.orig/src/thd_sensor.cpp
++++ thermald-1.7.0/src/thd_sensor.cpp
+@@ -28,7 +28,7 @@
+ cthd_sensor::cthd_sensor(int _index, std::string control_path,
+ 		std::string _type_str, int _type) :
+ 		index(_index), type(_type), sensor_sysfs(control_path.c_str()), sensor_active(
+-				false), type_str(_type_str), async_capable(false), virtual_sensor(false), thresholds(0) {
++				false), type_str(_type_str), async_capable(false), virtual_sensor(false), temp_unreadable(false), thresholds(0) {
+ 
+ }
+ 
diff -Nru thermald-1.7.0/debian/patches/series thermald-1.7.0/debian/patches/series
--- thermald-1.7.0/debian/patches/series	2018-04-17 15:21:28.000000000 +0000
+++ thermald-1.7.0/debian/patches/series	2018-04-20 01:08:23.000000000 +0000
@@ -1,2 +1,3 @@
 0001-Remove-upstart-support.patch
 0002-Don-t-keep-on-reading-a-sensor-if-the-temperature-is.patch
+0003-thermald-fix-uninitialised-member.patch