我已经成功安装了CUDA驱动程序，cuDNN库和tensorflow。但是在运行仅导入tensorflow的测试程序时，出现错误。该错误似乎表明我安装了错误版本的cuDNN库。我希望对此有所帮助。如果需要降级cuDNN，该怎么办？
Tensorflow版本：2.2 GPU操作系统：Ubuntu 16.04.6 LTS（GNU / Linux 4.4.0-184-generic x86_64）nvcc -V显示以下信息：
nvcc -V
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2015 NVIDIA Corporation
Built on Tue_Aug_11_14:27:32_CDT_2015
Cuda compilation tools, release 7.5, V7.5.17
nvidia-smi显示以下信息：
Fri Jun 12 17:16:38 2020
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 450.36.06 Driver Version: 450.36.06 CUDA Version: 11.0 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|===============================+======================+======================|
| 0 GeForce GTX 980 Ti Off | 00000000:02:00.0 Off | N/A |
| 22% 27C P8 17W / 250W | 74MiB / 6083MiB | 0% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=============================================================================|
| 0 N/A N/A 1489 G /usr/lib/xorg/Xorg 71MiB |
+-----------------------------------------------------------------------------+
cuDNN已成功安装以下说明https://docs.nvidia.com/deeplearning/sdk/cudnn-install/index.html#download，但我想我已安装版本11.0。
程序尝试导入tensorflow（python 3.6）时出现错误消息
2020-06-12 17:21:38.131160: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1561] Found device 0 with properties:
pciBusID: 0000:02:00.0 name: GeForce GTX 980 Ti computeCapability: 5.2
coreClock: 1.228GHz coreCount: 22 deviceMemorySize: 5.94GiB deviceMemoryBandwidth: 313.37GiB/s
2020-06-12 17:21:38.131384: W tensorflow/stream_executor/platform/default/dso_loader.cc:55] Could not load dynamic library 'libcudart.so.10.1'; dlerror: libcudart.so.10.1: cannot open shared object file: No such file or directory
2020-06-12 17:21:38.131498: W tensorflow/stream_executor/platform/default/dso_loader.cc:55] Could not load dynamic library 'libcublas.so.10'; dlerror: libcublas.so.10: cannot open shared object file: No such file or directory
2020-06-12 17:21:38.133367: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library libcufft.so.10
2020-06-12 17:21:38.133807: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library libcurand.so.10
2020-06-12 17:21:38.137813: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library libcusolver.so.10
2020-06-12 17:21:38.137958: W tensorflow/stream_executor/platform/default/dso_loader.cc:55] Could not load dynamic library 'libcusparse.so.10'; dlerror: libcusparse.so.10: cannot open shared object file: No such file or directory
2020-06-12 17:21:38.138063: W tensorflow/stream_executor/platform/default/dso_loader.cc:55] Could not load dynamic library 'libcudnn.so.7'; dlerror: libcudnn.so.7: cannot open shared object file: No such file or directory
2020-06-12 17:21:38.138085: W tensorflow/core/common_runtime/gpu/gpu_device.cc:1598] Cannot dlopen some GPU libraries. Please make sure the missing libraries mentioned above are installed properly if you would like to use GPU. Follow the guide at https://www.tensorflow.org/install/gpu for how to download and setup the required libraries for your platform.
Skipping registering GPU devices...
2020-06-12 17:21:38.138114: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1102] Device interconnect StreamExecutor with strength 1 edge matrix:
2020-06-12 17:21:38.138131: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1108] 0
2020-06-12 17:21:38.138152: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1121] 0: N
按照以下说明，对于tensorflow 2.2，您需要CUDA 10.1和cuDNN 7.4：
https://www.tensorflow.org/install/source_windows#tested_build_configurations
CUDA存档/旧版本：https://developer.nvidia.com/cuda-toolkit-archive
cuDNN存档，您必须创建一个nvidia帐户才能访问：https://developer.nvidia.com/rdp/cudnn-archive
特别注意的是，在7.4版本中没有与10.1兼容的cuDNN，所以我会尝试7.5.0。安装cuDNN只需要将下载的文件复制到安装CUDA的文件夹中（在它们各自的文件夹中）即可。