tessellation surface shader not working

as you can see from the following picture, the unity422f1 tessellation shader, just imported from the import package option, is not working at all. Is this a bug? It seems to be the surface shader that is bugging, the unity DirectX 11 demo file HLSL tessellation shader produces okay results, as shown in picture 2, but it doesn't have normal mapping.

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[2]: /storage/temp/17067-tess2.jpg