Merge pull request #531 from nouiz/crash_fix

NEWS.txt

@@ -44,6 +44,9 @@ Internal changes
 
 Crash Fix
  * Don't try to use blas library when told to don't use them(Frederic B.)
+ * When importing theano on a computer without without gpu with the Theano
+   flags device or init_gpu_device to gpu* (Frederic B., Reported Luo Heng)
+
 
 =============
 Release Notes

theano/__init__.py

@@ -101,8 +101,9 @@ if config.device.startswith('gpu') or config.init_gpu_device.startswith('gpu'):
 # We can't test the driver during import of theano.sandbox.cuda as
 # this cause circular import dependency. So we also test it manually
 # after the import
-    import theano.sandbox.cuda.tests.test_driver
-    theano.sandbox.cuda.tests.test_driver.test_nvidia_driver1()
+    if theano.sandbox.cuda.cuda_available:
+        import theano.sandbox.cuda.tests.test_driver
+        theano.sandbox.cuda.tests.test_driver.test_nvidia_driver1()
 
 # Use config.numpy to call numpy.seterr
 import numpy