fix the init of the gpu device when their is none.

__init__.py

@@ -13,6 +13,19 @@ import theano.compile.sandbox
 
 import logging, os
 
+import logging, copy
+_logger_name = 'theano_cuda_ndarray'
+_logger = logging.getLogger(_logger_name)
+_logger.setLevel(logging.WARN)
+_logger.addHandler(logging.StreamHandler())
+def warning(*msg):
+    _logger.warning(_logger_name+'WARNING: '+' '.join(str(m) for m in msg))
+def info(*msg):
+    _logger.info(_logger_name+'INFO: '+' '.join(str(m) for m in msg))
+def debug(*msg):
+    _logger.debug(_logger_name+'DEBUG: '+' '.join(str(m) for m in msg))
+
+
 def use(device=None):
     if use.device_number is None:
         # No successful call to use() has been made yet
@@ -27,7 +40,6 @@ def use(device=None):
             use.device_number = device
         except RuntimeError, e:
             logging.getLogger('theano_cuda_ndarray').warning("WARNING: Won't use the GPU as the initialisation of device %i failed. %s" %(device, e))
-            raise
     elif use.device_number != device:
         logging.getLogger('theano_cuda_ndarray').warning("WARNING: ignoring call to use(%s), GPU number %i is already in use." %(str(device), use.device_number))