diff --git a/org.qubesos.QubesManager.conf b/org.qubesos.QubesManager.conf
new file mode 100644
index 0000000..5bc7dad
--- /dev/null
+++ b/org.qubesos.QubesManager.conf
@@ -0,0 +1,15 @@
+<!DOCTYPE busconfig PUBLIC
+ "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
+ "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
+<busconfig>
+  <!-- This config allows anyone to control QubesManager -->
+
+  <policy context="default">
+    <allow send_destination="org.qubesos.QubesManager"/>
+  </policy>
+
+  <policy group="qubes">
+    <allow own="org.qubesos.QubesManager"/>
+  </policy>
+</busconfig>
+
diff --git a/org.qubesos.QubesManager.xml b/org.qubesos.QubesManager.xml
new file mode 100644
index 0000000..bd0cd22
--- /dev/null
+++ b/org.qubesos.QubesManager.xml
@@ -0,0 +1,19 @@
+<!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.qubesos.QubesManager">
+    <method name="notify_error">
+      <arg name="vmname" type="s" direction="in"/>
+      <arg name="message" type="s" direction="in"/>
+      <annotation name="org.freedesktop.DBus.Method.NoReply" value="true"/>
+    </method>
+    <method name="clear_error_exact">
+      <arg name="vmname" type="s" direction="in"/>
+      <arg name="message" type="s" direction="in"/>
+      <annotation name="org.freedesktop.DBus.Method.NoReply" value="true"/>
+    </method>
+    <method name="clear_error">
+      <arg name="vmname" type="s" direction="in"/>
+      <annotation name="org.freedesktop.DBus.Method.NoReply" value="true"/>
+    </method>
+  </interface>
+</node>
diff --git a/qubesmanager/main.py b/qubesmanager/main.py
index 5df12fe..013b591 100755
--- a/qubesmanager/main.py
+++ b/qubesmanager/main.py
@@ -26,6 +26,8 @@ import signal
 import fcntl
 import errno
 import dbus
+import dbus.service
+from dbus.mainloop.qt import DBusQtMainLoop
 from PyQt4.QtCore import *
 from PyQt4.QtGui import *
 
@@ -62,6 +64,9 @@ qubes_guid_path = '/usr/bin/qubes_guid'
 
 update_suggestion_interval = 14 # 14 days
 
+dbus_object_path = '/org/qubesos/QubesManager'
+dbus_interface = 'org.qubesos.QubesManager'
+
 power_order = Qt.DescendingOrder
 update_order = Qt.AscendingOrder
 
@@ -1810,6 +1815,42 @@ class QubesTrayIcon(QSystemTrayIcon):
             action.setCheckable(True)
         return action
 
+class QubesDbusNotify(dbus.service.Object):
+    def __init__(self, bus, manager_window):
+        # export to system bus (instead of session) to make possible
+        # communication from outside of session (eg. from qmemman)
+        dbus.service.Object.__init__(self, bus, dbus_object_path)
+        self.manager_window = manager_window
+
+    @dbus.service.method(dbus_interface=dbus_interface,
+            in_signature='ss', out_signature='')
+    def notify_error(self, vmname, message):
+        vm = self.manager_window.qvm_collection.get_vm_by_name(vmname)
+        if vm:
+            self.manager_window.set_error(vm.qid, message)
+        else:
+            # ignore VM-not-found error
+            pass
+    @dbus.service.method(dbus_interface=dbus_interface,
+            in_signature='ss', out_signature='')
+    def clear_error_exact(self, vmname, message):
+        vm = self.manager_window.qvm_collection.get_vm_by_name(vmname)
+        if vm:
+            self.manager_window.clear_error_exact(vm.qid, message)
+        else:
+            # ignore VM-not-found error
+            pass
+
+    @dbus.service.method(dbus_interface=dbus_interface,
+            in_signature='s', out_signature='')
+    def clear_error(self, vmname):
+        vm = self.manager_window.qvm_collection.get_vm_by_name(vmname)
+        if vm:
+            self.manager_window.clear_error(vm.qid, message)
+        else:
+            # ignore VM-not-found error
+            pass
+
 def get_frame_size():
     w = 0
     h = 0
@@ -1923,6 +1964,10 @@ def main():
 
     sys.excepthook = handle_exception
 
+    # setup dbus connection
+    DBusQtMainLoop(set_as_default=True)
+
+
     global manager_window
     manager_window = VmManagerWindow()
     wm = WatchManager()
@@ -1933,6 +1978,11 @@ def main():
     notifier.start()
     wdd = wm.add_watch(qubes_store_filename, mask)
 
+    global system_bus
+    system_bus = dbus.SystemBus()
+    name = dbus.service.BusName('org.qubesos.QubesManager', system_bus)
+    dbus_notifier = QubesDbusNotify(system_bus, manager_window)
+
     global trayIcon
     trayIcon = QubesTrayIcon(QIcon(":/qubes.png"))
     trayIcon.show()
diff --git a/rpm_spec/qmgr.spec b/rpm_spec/qmgr.spec
index d2d1b80..e382e3d 100644
--- a/rpm_spec/qmgr.spec
+++ b/rpm_spec/qmgr.spec
@@ -13,6 +13,7 @@ License:	GPL
 URL:		http://fixme
 Requires:	python, PyQt4, qubes-core-dom0 > 1.7.23, kdebase
 Requires:	pmount, cryptsetup, wmctrl
+Requires:	dbus
 BuildRequires:	PyQt4-devel
 AutoReq:	0
 
@@ -64,6 +65,9 @@ cp qubes-manager.desktop $RPM_BUILD_ROOT/usr/share/applications
 mkdir -p $RPM_BUILD_ROOT/etc/xdg/autostart/
 cp qubes-manager.desktop $RPM_BUILD_ROOT/etc/xdg/autostart/
 
+install -D org.qubesos.QubesManager.conf $RPM_BUILD_ROOT/etc/dbus-1/system.d/org.qubesos.QubesManager.conf
+install -D org.qubesos.QubesManager.xml $RPM_BUILD_ROOT/usr/share/dbus-1/interfaces/org.qubesos.QubesManager.xml
+
 %post
 update-desktop-database &> /dev/null || :
 killall -1 qubes-manager || :
@@ -152,3 +156,5 @@ rm -rf $RPM_BUILD_ROOT
 
 /usr/share/applications/qubes-manager.desktop
 /etc/xdg/autostart/qubes-manager.desktop
+/etc/dbus-1/system.d/org.qubesos.QubesManager.conf
+/usr/share/dbus-1/interfaces/org.qubesos.QubesManager.xml