diff --git a/txupnp/gateway.py b/txupnp/gateway.py
index d1423fd..c55cb94 100644
--- a/txupnp/gateway.py
+++ b/txupnp/gateway.py
@@ -82,8 +82,10 @@ class Gateway(object):
     def discover_services(self):
         log.info("querying %s", self.location)
         response = yield treq.get(self.location)
-        response_xml = yield response.text()
+        response_xml = yield response.content()
         self._device = RootDevice(response_xml)
+        if not self._device.devices or not self._device.services:
+            log.error("failed to parse device: \n%s", response_xml)
 
     @property
     def services(self):
diff --git a/txupnp/scpd.py b/txupnp/scpd.py
index 71ed494..9a4f8ad 100644
--- a/txupnp/scpd.py
+++ b/txupnp/scpd.py
@@ -155,6 +155,7 @@ class SCPDCommandRunner(object):
     @staticmethod
     def _soap_function_info(action_dict):
         if not action_dict.get('argumentList'):
+            log.warning("don't know how to handle argument list: %s", action_dict)
             return (
                 action_dict['name'],
                 [],