diff --git a/actors/linux/debian/control b/actors/linux/debian/control
index cb7af4d4..6c65d7a8 100644
--- a/actors/linux/debian/control
+++ b/actors/linux/debian/control
@@ -10,7 +10,7 @@ Package: udsactor
 Section: admin
 Priority: optional
 Architecture: all
-Depends: policykit-1(>=0.100), python-requests (>=0.8.2), python-qt4 (>=4.9), python-six(>=1.1), python-prctl(>=1.1.1), python (>=2.7),  ${misc:Depends}
+Depends: policykit-1(>=0.100), python-requests (>=0.8.2), python-qt4 (>=4.9), python-six(>=1.1), python-prctl(>=1.1.1), python (>=2.7), libxss1, ${misc:Depends}
 Description: Actor for Universal Desktop Services (UDS) Broker
  This package provides the required components to allow this machine to work on an environment managed by UDS Broker.
 
diff --git a/actors/src/udsactor/linux/CheckSystray.py b/actors/src/udsactor/linux/CheckSystray.py
deleted file mode 100644
index 25658c8d..00000000
--- a/actors/src/udsactor/linux/CheckSystray.py
+++ /dev/null
@@ -1,46 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-#
-# Copyright (c) 2014 Virtual Cable S.L.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without modification,
-# are permitted provided that the following conditions are met:
-#
-#    * Redistributions of source code must retain the above copyright notice,
-#      this list of conditions and the following disclaimer.
-#    * Redistributions in binary form must reproduce the above copyright notice,
-#      this list of conditions and the following disclaimer in the documentation
-#      and/or other materials provided with the distribution.
-#    * Neither the name of Virtual Cable S.L. nor the names of its contributors
-#      may be used to endorse or promote products derived from this software
-#      without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-'''
-@author: Adolfo Gómez, dkmaster at dkmon dot com
-'''
-from __future__ import unicode_literals
-
-import sys
-from PyQt4 import QtGui
-
-# Simple systray checker
-# On startup, if our user app will need systray to be present, so we may give some time
-if __name__ == '__main__':
-    app = QtGui.QApplication(sys.argv)
-
-    if not QtGui.QSystemTrayIcon.isSystemTrayAvailable():
-        sys.exit(1)
-
-    sys.exit(0)
diff --git a/actors/src/udsactor/linux/operations.py b/actors/src/udsactor/linux/operations.py
index fadfff3c..60766cfa 100644
--- a/actors/src/udsactor/linux/operations.py
+++ b/actors/src/udsactor/linux/operations.py
@@ -35,10 +35,13 @@ import socket
 import platform
 import fcntl
 import os
+import ctypes
+import ctypes.util
 import struct
 import array
 import six
 from udsactor import utils
+from .renamer import rename
 
 
 def _getMacAddr(ifname):
@@ -143,7 +146,7 @@ def loggoff():
 
 
 def renameComputer(newName):
-    pass
+    rename(newName)
 
 
 def joinDomain(domain, ou, account, password, executeInOneStep=False):
@@ -157,5 +160,46 @@ def changeUserPassword(user, oldPassword, newPassword):
     os.system('echo "{1}\n{1}" | /usr/bin/passwd {0} 2> /dev/null'.format(user, newPassword))
 
 
+class XScreenSaverInfo(ctypes.Structure):
+    _fields_ = [('window', ctypes.c_long),
+                ('state', ctypes.c_int),
+                ('kind', ctypes.c_int),
+                ('til_or_since', ctypes.c_ulong),
+                ('idle', ctypes.c_ulong),
+                ('eventMask', ctypes.c_ulong)]
+
+# Initialize xlib & xss
+try:
+    xlibPath = ctypes.util.find_library('X11')
+    xssPath = ctypes.util.find_library('Xss')
+    xlib = ctypes.cdll.LoadLibrary(xlibPath)
+    xss = ctypes.cdll.LoadLibrary(xssPath)
+
+    # Fix result type to XScreenSaverInfo Structure
+    xss.XScreenSaverQueryExtension.restype = ctypes.c_int
+    xss.XScreenSaverAllocInfo.restype = ctypes.POINTER(XScreenSaverInfo)  # Result in a XScreenSaverInfo structure
+
+except Exception:  # Libraries not accesible, not found or whatever..
+    xlib = xss = None
+
+
 def getIdleDuration():
-    return 0
+    '''
+    Returns idle duration, in seconds
+    '''
+    if xlib is None or xss is None:
+        return 0  # Libraries not available
+
+    # production code might want to not hardcode the offset 16...
+    display = xlib.XOpenDisplay(None)
+
+    event_base = ctypes.c_int()
+    error_base = ctypes.c_int()
+
+    available = xss.XScreenSaverQueryExtension(display, ctypes.byref(event_base), ctypes.byref(error_base))
+    if available != 1:
+        return 0
+
+    info = xss.XScreenSaverAllocInfo()
+    xss.XScreenSaverQueryInfo(display, xlib.XDefaultRootWindow(display), info)
+    return info.contents.idle / 1000.0