[sensors]: Workaround for apparent bug in lm-sensors (#1058)

dockers/docker-platform-monitor/lm-sensors.sh

@@ -3,7 +3,19 @@
 # Based off /etc/init.d/lm-sensors
 #
 
-/usr/bin/sensors -s > /dev/null 2>&1
+
+# NOTE: lm-sensors v3.3.5 appears to have a bug. If `sensors -s` is called, it
+# will first load /etc/sensors.conf, then load all files in /etc/sensors.d/,
+# overriding any values that may have already been specified in
+# /etc/sensors.conf. However, it appears this overriding is not taking place.
+# As a workaround, as long as a platform-specific sensors.conf has been copied
+# to /etc/sensors.d/, we will ONLY load that file, otherwise we load the default.
+if [ -e /etc/sensors.d/sensors.conf ]; then
+    /usr/bin/sensors -s -c /etc/sensors.d/sensors.conf > /dev/null 2>&1
+else
+    /usr/bin/sensors -s > /dev/null 2>&1
+fi
+
 /usr/bin/sensors > /dev/null 2>&1
 
 # Currently, there is no way to run sensord in the foreground, so we