Martin Langhoff patch to solve registration session register failure.
side effects.

---
 src/jarabe/model/network.py |   11 +++++++++++
  1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/src/jarabe/model/network.py b/src/jarabe/model/network.py
index 47db43f..218752c 100644
--- a/src/jarabe/model/network.py
+++ b/src/jarabe/model/network.py
@@ -27,6 +27,7 @@ import dbus.service
 import gobject
 import ConfigParser
 import gconf
+import ctypes
 
 from sugar import dispatch
 from sugar import env
@@ -501,6 +502,16 @@ class NMSettingsConnection(dbus.service.Object):
                 if self._settings.connection.type == NM_CONNECTION_TYPE_802_11_WIRELESS:
                     self.save()
 
+        try:
+            # try to flush resolver cache - SL#1940
+            # ctypes' syntactic sugar does not work
+            # so we must get the func ptr explicitly
+            libc = ctypes.CDLL('libc.so.6')
+            res_init = getattr(libc, '__res_init')
+            res_init(None)
+        except:
+            logging.error('Error calling libc.__res_init')
+
     def set_secrets(self, secrets):
         self._secrets = secrets
         if self._settings.connection.type == NM_CONNECTION_TYPE_802_11_WIRELESS:
--