Add nv driver version notes (#3280)

* add nvidia version requirements

* add link

* fix case

* rm number

Former-commit-id: 81502a2

README.md

@@ -2,6 +2,12 @@
 
 ### Install OneFlow
 
+  #### System Requirements
+
+  - Nvidia Linux x86_64 driver version >= 440.33
+
+  #### Install Pip package
+
   - To install latest release of OneFlow:
 
     ```

docs/source/troubleshooting.md

@@ -1,9 +1,17 @@
 # Troubleshooting
 
+- `CUDNN_STATUS_NOT_INITIALIZED`
+    - You might see error message like this: 
+        ```
+        F0723 19:05:56.194067 40970 cuda_util.cpp:82] Check failed: error == CUDNN_STATUS_SUCCESS (1 vs. 0) CUDNN_STATUS_NOT_INITIALIZED
+        ```
+    - Please upgrade to Nvidia Linux x86_64 driver version >= 440.33
+    - For more information, please refer to [cuda compatibility docs](https://docs.nvidia.com/deploy/cuda-compatibility/index.html).
+
 - Failed to compile `.cu` files
-    1. Please refer to [CUDA System Requirements](https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#system-requirements) . Make sure your linux distribution and libraries shipped with it meet the requirements.
-    2. If you are using tools like conda, please make sure libraries you install doesn't shade the proper installation comes with linux distribution or package management like apt-get.
-    3. Please build OneFlow with a newer version of CMake. You could download version 3.14 from here: [https://github.com/Kitware/CMake/releases/download/v3.14.0/cmake-3.14.0-Linux-x86_64.tar.gz](https://github.com/Kitware/CMake/releases/download/v3.14.0/cmake-3.14.0-Linux-x86_64.tar.gz)
+    - Please refer to [CUDA System Requirements](https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#system-requirements) . Make sure your linux distribution and libraries shipped with it meet the requirements.
+    - If you are using tools like conda, please make sure libraries you install doesn't shade the proper installation comes with linux distribution or package management like apt-get.
+    - Please build OneFlow with a newer version of CMake. You could download version 3.14 from here: [https://github.com/Kitware/CMake/releases/download/v3.14.0/cmake-3.14.0-Linux-x86_64.tar.gz](https://github.com/Kitware/CMake/releases/download/v3.14.0/cmake-3.14.0-Linux-x86_64.tar.gz)
 
 - How do I know what compilers and flags are used to compile OneFlow?
     - run `make clean && make VERBOSE=1` to get exact compile commands with compiler path and flags