diff --git a/NEWS b/NEWS
index 1997fdd3..e32cefc3 100644
--- a/NEWS
+++ b/NEWS
@@ -15,6 +15,8 @@ Bugs corrected:
 
     * Fix Cassandra table name export #1402
     * 500 Internal Server Error /api/3/network/interface_name #1401
+    * Connection to MQTT server failed : getaddrinfo() argument 2 must be integer or string #1450
+    * `l` keypress (hide alert log) not working after some time #1449
 
 Others:
 
diff --git a/conf/glances.conf b/conf/glances.conf
index aaa3c420..26855ba5 100644
--- a/conf/glances.conf
+++ b/conf/glances.conf
@@ -413,6 +413,7 @@ port=8883
 user=guest
 password=guest
 topic=glances
+tls=true
 
 [couchdb]
 # Configuration for the --export couchdb option
diff --git a/glances/exports/glances_mqtt.py b/glances/exports/glances_mqtt.py
index 122113e7..21a5e710 100644
--- a/glances/exports/glances_mqtt.py
+++ b/glances/exports/glances_mqtt.py
@@ -42,20 +42,22 @@ class Export(GlancesExport):
         self.user = None
         self.password = None
         self.topic = None
+        self.tls = 'true'
 
         # Load the MQTT configuration file
         self.export_enable = self.load_conf('mqtt',
                                             mandatories=['host', 'password'],
-                                            options=['port', 'user', 'topic'])
+                                            options=['port', 'user', 'topic', 'tls'])
         if not self.export_enable:
             exit('Missing MQTT config')
 
         # Get the current hostname
         self.hostname = socket.gethostname()
 
-        self.port = self.port or 8883
+        self.port = int(self.port) or 8883
         self.topic = self.topic or 'glances'
         self.user = self.user or 'glances'
+        self.tls = (self.tls.lower() == 'true')
 
         # Init the MQTT client
         self.client = self.init()
@@ -69,7 +71,8 @@ class Export(GlancesExport):
                                  clean_session=False)
             client.username_pw_set(username=self.user,
                                    password=self.password)
-            client.tls_set(certs.where())
+            if self.tls:
+                client.tls_set(certs.where())
             client.connect(host=self.host,
                            port=self.port)
             client.loop_start()
@@ -81,8 +84,8 @@ class Export(GlancesExport):
     def export(self, name, columns, points):
         """Write the points in MQTT."""
 
-        WHITELIST='_-' + string.ascii_letters + string.digits
-        SUBSTITUTE='_'
+        WHITELIST = '_-' + string.ascii_letters + string.digits
+        SUBSTITUTE = '_'
 
         def whitelisted(s,
                         whitelist=WHITELIST,
diff --git a/glances/plugins/glances_alert.py b/glances/plugins/glances_alert.py
index 06aeb7f8..041433a9 100644
--- a/glances/plugins/glances_alert.py
+++ b/glances/plugins/glances_alert.py
@@ -114,59 +114,48 @@ class Plugin(GlancesPlugin):
         ret = []
 
         # Only process if display plugin enable...
-        if not self.stats and self.is_disable():
+        if not self.stats or self.is_disable():
             return ret
 
         # Build the string message
         # Header
         ret.append(self.curse_add_line(global_message(), "TITLE"))
-        if self.stats:
-            # Header
-            # msg = 'Warning or critical alerts'
-            # ret.append(self.curse_add_line(msg, "TITLE"))
-            # logs_len = glances_events.len()
-            # if logs_len > 1:
-            #     msg = ' (last {} entries)'.format(logs_len)
-            # else:
-            #     msg = ' (one entry)'
-            # ret.append(self.curse_add_line(msg, "TITLE"))
-            # Loop over alerts
-            for alert in self.stats:
-                # New line
-                ret.append(self.curse_new_line())
-                # Start
-                msg = str(datetime.fromtimestamp(alert[0]))
+        # Loop over alerts
+        for alert in self.stats:
+            # New line
+            ret.append(self.curse_new_line())
+            # Start
+            msg = str(datetime.fromtimestamp(alert[0]))
+            ret.append(self.curse_add_line(msg))
+            # Duration
+            if alert[1] > 0:
+                # If finished display duration
+                msg = ' ({})'.format(datetime.fromtimestamp(alert[1]) -
+                                     datetime.fromtimestamp(alert[0]))
+            else:
+                msg = ' (ongoing)'
+            ret.append(self.curse_add_line(msg))
+            ret.append(self.curse_add_line(" - "))
+            # Infos
+            if alert[1] > 0:
+                # If finished do not display status
+                msg = '{} on {}'.format(alert[2], alert[3])
                 ret.append(self.curse_add_line(msg))
-                # Duration
-                if alert[1] > 0:
-                    # If finished display duration
-                    msg = ' ({})'.format(datetime.fromtimestamp(alert[1]) -
-                                         datetime.fromtimestamp(alert[0]))
-                else:
-                    msg = ' (ongoing)'
+            else:
+                msg = str(alert[3])
+                ret.append(self.curse_add_line(msg, decoration=alert[2]))
+            # Min / Mean / Max
+            if self.approx_equal(alert[6], alert[4], tolerance=0.1):
+                msg = ' ({:.1f})'.format(alert[5])
+            else:
+                msg = ' (Min:{:.1f} Mean:{:.1f} Max:{:.1f})'.format(
+                    alert[6], alert[5], alert[4])
+            ret.append(self.curse_add_line(msg))
+            # Top processes
+            top_process = ', '.join([p['name'] for p in alert[9]])
+            if top_process != '':
+                msg = ': {}'.format(top_process)
                 ret.append(self.curse_add_line(msg))
-                ret.append(self.curse_add_line(" - "))
-                # Infos
-                if alert[1] > 0:
-                    # If finished do not display status
-                    msg = '{} on {}'.format(alert[2], alert[3])
-                    ret.append(self.curse_add_line(msg))
-                else:
-                    msg = str(alert[3])
-                    ret.append(self.curse_add_line(msg, decoration=alert[2]))
-                # Min / Mean / Max
-                if self.approx_equal(alert[6], alert[4], tolerance=0.1):
-                    msg = ' ({:.1f})'.format(alert[5])
-                else:
-                    msg = ' (Min:{:.1f} Mean:{:.1f} Max:{:.1f})'.format(
-                        alert[6], alert[5], alert[4])
-                ret.append(self.curse_add_line(msg))
-                # Top processes
-                top_process = ', '.join([p['name'] for p in alert[9]])
-                if top_process != '':
-                    msg = ': {}'.format(top_process)
-                    ret.append(self.curse_add_line(msg))
-                # logger.info(alert)
 
         return ret