Index: umpa/branches/link-layer-integration/umit/umpa/sniffing/libpcap/pypcap.py
===================================================================
--- umpa/branches/link-layer-integration/umit/umpa/sniffing/libpcap/pypcap.py (revision 5170)
+++ umpa/branches/link-layer-integration/umit/umpa/sniffing/libpcap/pypcap.py (revision 5664)
@@ -53,5 +53,5 @@
         try:
             self._pcap = pcap.pcap(self.device, self.snaplen, self.promisc,
-                                                                self.to_ms)
+                                                self.to_ms, immediate=True)
         except OSError, msg:
             raise UMPASniffingException(msg)