diff --git a/korgac/CMakeLists.txt b/korgac/CMakeLists.txt
--- a/korgac/CMakeLists.txt
+++ b/korgac/CMakeLists.txt
@@ -34,6 +34,8 @@
     KOAlarmClient
     )
 
+qt5_add_dbus_interface(korgac_SRCS org.freedesktop.Notifications.xml notifications_interface)
+qt5_add_dbus_interface(korgac_SRCS org.freedesktop.DBus.Properties.xml dbusproperties)
 
 file(GLOB ICONS_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/pixmaps/*-apps-korgac.png")
 ecm_add_app_icon(korgac_SRCS ICONS ${ICONS_SRCS})
diff --git a/korgac/alarmdialog.h b/korgac/alarmdialog.h
--- a/korgac/alarmdialog.h
+++ b/korgac/alarmdialog.h
@@ -109,6 +109,12 @@
     void closeEvent(QCloseEvent *) override;
     void showEvent(QShowEvent *event) override;
 
+private Q_SLOTS:
+    void slotDBusNotificationsPropertiesChanged(
+            const QString& interface,
+            const QVariantMap& changedProperties,
+            const QStringList& invalidatedProperties);
+
 private:
     void update();
     void updateButtons();
diff --git a/korgac/alarmdialog.cpp b/korgac/alarmdialog.cpp
--- a/korgac/alarmdialog.cpp
+++ b/korgac/alarmdialog.cpp
@@ -30,6 +30,9 @@
 #include "mailclient.h"
 #include "koalarmclient_debug.h"
 
+#include "notifications_interface.h" // DBUS-generated
+#include "dbusproperties.h" // DBUS-generated
+
 #include <CalendarSupport/IncidenceViewer>
 #include <CalendarSupport/KCalPrefs>
 #include <CalendarSupport/IdentityManager>
@@ -78,6 +81,9 @@
 static int defSuspendVal = 5;
 static int defSuspendUnit = AlarmDialog::SuspendInMinutes;
 
+static const char s_fdo_notifications_service[] = "org.freedesktop.Notifications";
+static const char s_fdo_notifications_path[] = "/org/freedesktop/Notifications";
+
 class ReminderTreeItem : public QTreeWidgetItem
 {
 public:
@@ -332,6 +338,16 @@
     connect(mUser3Button, &QPushButton::clicked, this, &AlarmDialog::slotUser3);
 
     mIdentityManager = new CalendarSupport::IdentityManager;
+
+    QDBusConnection dbusConn = QDBusConnection::sessionBus();
+    if (dbusConn.interface()->isServiceRegistered(QString::fromLatin1(s_fdo_notifications_service))) {
+        OrgFreedesktopDBusPropertiesInterface *propsIface = new OrgFreedesktopDBusPropertiesInterface(
+                QString::fromLatin1(s_fdo_notifications_service),
+                QString::fromLatin1(s_fdo_notifications_path),
+                dbusConn, this);
+        connect(propsIface, &OrgFreedesktopDBusPropertiesInterface::PropertiesChanged,
+                this, &AlarmDialog::slotDBusNotificationsPropertiesChanged);
+    }
 }
 
 AlarmDialog::~AlarmDialog()
@@ -769,6 +785,19 @@
 
 void AlarmDialog::wakeUp()
 {
+    // Check if notifications are inhibited (e.x. plasma "do not disturb" mode.
+    // In that case, we'll wait until they are allowed again (see slotDBusNotificationsPropertiesChanged)
+    QDBusConnection dbusConn = QDBusConnection::sessionBus();
+    if (dbusConn.interface()->isServiceRegistered(QString::fromLatin1(s_fdo_notifications_service))) {
+        OrgFreedesktopNotificationsInterface iface(
+                QString::fromLatin1(s_fdo_notifications_service),
+                QString::fromLatin1(s_fdo_notifications_path),
+                dbusConn);
+        if (iface.inhibited()) {
+            return;
+        }
+    }
+
     bool activeReminders = false;
     QTreeWidgetItemIterator it(mIncidenceTree);
     QTreeWidgetItem *firstItem = nullptr;
@@ -800,6 +829,24 @@
     Q_EMIT reminderCount(activeCount());
 }
 
+void AlarmDialog::slotDBusNotificationsPropertiesChanged(
+        const QString& interface,
+        const QVariantMap& changedProperties,
+        const QStringList& invalidatedProperties)
+{
+    Q_UNUSED(interface); // always "org.freedesktop.Notifications"
+    Q_UNUSED(invalidatedProperties);
+    const auto it = changedProperties.find(QStringLiteral("Inhibited"));
+    if (it != changedProperties.end()) {
+        const bool inhibited = it.value().toBool();
+        qCDebug(KOALARMCLIENT_LOG) << "Notifications inhibited:" << inhibited;
+        if (!inhibited) {
+            wakeUp();
+        }
+    }
+}
+
+
 void AlarmDialog::slotSave()
 {
     KSharedConfig::Ptr config = KSharedConfig::openConfig();
diff --git a/korgac/org.freedesktop.DBus.Properties.xml b/korgac/org.freedesktop.DBus.Properties.xml
new file mode 100644
--- /dev/null
+++ b/korgac/org.freedesktop.DBus.Properties.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0"?>
+<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
+<!-- GDBus 2.32.4 -->
+<node>
+  <interface name="org.freedesktop.DBus.Properties">
+    <method name="Get">
+      <arg type="s" name="interface_name" direction="in"/>
+      <arg type="s" name="property_name" direction="in"/>
+      <arg type="v" name="value" direction="out"/>
+    </method>
+    <method name="GetAll">
+      <arg type="s" name="interface_name" direction="in"/>
+      <arg type="a{sv}" name="properties" direction="out"/>
+      <annotation name="org.qtproject.QtDBus.QtTypeName.Out0" value="QVariantMap" />
+    </method>
+    <method name="Set">
+      <arg type="s" name="interface_name" direction="in"/>
+      <arg type="s" name="property_name" direction="in"/>
+      <arg type="v" name="value" direction="in"/>
+    </method>
+    <signal name="PropertiesChanged">
+      <arg type="s" name="interface_name"/>
+      <arg type="a{sv}" name="changed_properties"/>
+      <arg type="as" name="invalidated_properties"/>
+      <annotation name="org.qtproject.QtDBus.QtTypeName.Out1" value="QVariantMap" />
+    </signal>
+  </interface>
+</node>
diff --git a/korgac/org.freedesktop.Notifications.xml b/korgac/org.freedesktop.Notifications.xml
new file mode 100644
--- /dev/null
+++ b/korgac/org.freedesktop.Notifications.xml
@@ -0,0 +1,60 @@
+<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
+<node>
+  <interface name="org.freedesktop.Notifications">
+    <signal name="NotificationClosed">
+      <arg name="id" type="u" direction="out"/>
+      <arg name="reason" type="u" direction="out"/>
+    </signal>
+    <signal name="ActionInvoked">
+      <arg name="id" type="u" direction="out"/>
+      <arg name="action_key" type="s" direction="out"/>
+    </signal>
+    <method name="Notify">
+      <annotation name="org.qtproject.QtDBus.QtTypeName.In6" value="QVariantMap"/>
+      <arg type="u" direction="out"/>
+      <arg name="app_name" type="s" direction="in"/>
+      <arg name="replaces_id" type="u" direction="in"/>
+      <arg name="app_icon" type="s" direction="in"/>
+      <arg name="summary" type="s" direction="in"/>
+      <arg name="body" type="s" direction="in"/>
+      <arg name="actions" type="as" direction="in"/>
+      <arg name="hints" type="a{sv}" direction="in"/>
+      <arg name="timeout" type="i" direction="in"/>
+    </method>
+    <method name="CloseNotification">
+      <arg name="id" type="u" direction="in"/>
+    </method>
+    <method name="GetCapabilities">
+      <arg type="as" name="caps" direction="out"/>
+    </method>
+    <method name="GetServerInformation">
+      <arg type="s" name="name" direction="out"/>
+      <arg type="s" name="vendor" direction="out"/>
+      <arg type="s" name="version" direction="out"/>
+      <arg type="s" name="spec_version" direction="out"/>
+    </method>
+
+    <!-- Inhibitions -->
+    <method name="Inhibit">
+      <annotation name="org.qtproject.QtDBus.QtTypeName.In2" value="QVariantMap"/>
+      <arg type="u" direction="out"/>
+      <arg name="desktop_entry" type="s" direction="in"/>
+      <arg name="reason" type="s" direction="in"/>
+      <arg name="hints" type="a{sv}" direction="in"/>
+    </method>
+
+    <method name="UnInhibit">
+      <arg type="u" direction="in"/>
+    </method>
+
+    <property name="Inhibited" type="b" access="read">
+      <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="true"/>
+    </property>
+
+    <!--<method name="ListInhibitors">
+      <annotation name="org.qtproject.QtDBus.QtTypeName.Out0" value="QList&lt;Inhibition&gt;"/>
+      <arg name="inhibitors" type="a(ssa{sv})" direction="out"/>
+    </method>-->
+
+  </interface>
+</node>
diff --git a/korgac/tests/CMakeLists.txt b/korgac/tests/CMakeLists.txt
--- a/korgac/tests/CMakeLists.txt
+++ b/korgac/tests/CMakeLists.txt
@@ -9,12 +9,19 @@
 
 ########### next target ###############
 
-set(testalarmdlg_SRCS testalarmdlg.cpp ${CMAKE_CURRENT_SOURCE_DIR}/../alarmdialog.cpp ../mailclient.cpp ${korganizer_BINARY_DIR}/korgac/koalarmclient_debug.cpp)
+set(testalarmdlg_SRCS
+    testalarmdlg.cpp
+    ../alarmdialog.cpp
+    ../mailclient.cpp
+    ${korganizer_BINARY_DIR}/korgac/koalarmclient_debug.cpp)
 
 qt5_add_dbus_interface(testalarmdlg_SRCS ${korganizer_xml}
     korganizer_interface
     )
 
+qt5_add_dbus_interface(testalarmdlg_SRCS ../org.freedesktop.Notifications.xml notifications_interface)
+qt5_add_dbus_interface(testalarmdlg_SRCS ../org.freedesktop.DBus.Properties.xml dbusproperties)
+
 add_executable(testalarmdlg ${testalarmdlg_SRCS})
 
 target_link_libraries(testalarmdlg