diff -r 07ff9bffe54d src/virtManager/connection.py
--- a/src/virtManager/connection.py	Mon Feb 18 10:02:21 2008 -0500
+++ b/src/virtManager/connection.py	Thu Feb 21 11:33:13 2008 +0900
@@ -151,12 +151,13 @@ class vmmConnection(gobject.GObject):
             # find all bonding master devices and register them
             # XXX bonding stuff is linux specific
             bondMasters = self._net_get_bonding_masters()
-            for bond in bondMasters:
-                sysfspath = "/sys/class/net/" + bond
-                mac = self._net_get_mac_address(bond, sysfspath)
-                self._net_device_added(bond, mac, sysfspath)
-                # Add any associated VLANs
-                self._net_tag_device_added(bond, sysfspath)
+            if bondMasters is not None:
+                for bond in bondMasters:
+                    sysfspath = "/sys/class/net/" + bond
+                    mac = self._net_get_mac_address(bond, sysfspath)
+                    self._net_device_added(bond, mac, sysfspath)
+                    # Add any associated VLANs
+                    self._net_tag_device_added(bond, sysfspath)
 
             # Find info about all current present physical net devices
             # This is OS portable...
@@ -896,14 +897,17 @@ class vmmConnection(gobject.GObject):
 
     def _net_get_bonding_masters(self):
         masters = []
-        f = open("/sys/class/net/bonding_masters")
-        while True:
-            rline = f.readline()
-            if not rline: break
-            if rline == "\x00": continue
-            rline = rline.strip("\n\t")
-            masters = rline[:-1].split(' ')
-        return masters
+        if os.path.exists("/sys/class/net/bonding_masters"):
+            f = open("/sys/class/net/bonding_masters")
+            while True:
+                rline = f.readline()
+                if not rline: break
+                if rline == "\x00": continue
+                rline = rline.strip("\n\t")
+                masters = rline[:-1].split(' ')
+            return masters
+        else:
+            return None
 
     def _net_is_bonding_slave(self, name, sysfspath):
         masterpath = sysfspath + "/master"