Added config variable to disable initial testing of nvidia drivers

theano/__init__.py

@@ -107,7 +107,8 @@ if config.device.startswith('gpu') or config.init_gpu_device.startswith('gpu'):
     if theano.sandbox.cuda.cuda_available:
         import theano.sandbox.cuda.tests.test_driver
 
-        theano.sandbox.cuda.tests.test_driver.test_nvidia_driver1()
+        if config.enable_initial_driver_test:
+            theano.sandbox.cuda.tests.test_driver.test_nvidia_driver1()
 
 if (config.device.startswith('cuda') or
         config.device.startswith('opencl') or

theano/configdefaults.py

@@ -146,6 +146,13 @@ AddConfigVar(
     in_c_key=False)
 
 
+AddConfigVar(
+    'enable_initial_driver_test',
+    "Tests the nvidia driver when a GPU device is initialized.",
+    BoolParam(True, allow_override=False),
+    in_c_key=False)
+
+
 def default_cuda_root():
     v = os.getenv('CUDA_ROOT', "")
     if v: