无法安装 cudatoolkit=11.2 和 cudnn=8.1.0！我该怎么办。
conda install -c conda-forge cudatoolkit=11.2 cudnn=8.1.0
这个命令无法安装，我search发现没有这两个包：
(tf2) PS C:\Users\chai> conda search cuda
Loading channels: done
No match found for: cuda. Search: *cuda*
# Name Version Build Channel
cudatoolkit 8.0 4 anaconda/pkgs/main
cudatoolkit 9.0 1 anaconda/pkgs/main
cudatoolkit 9.2 0 anaconda/pkgs/main
cudatoolkit 10.0.130 0 anaconda/pkgs/main
cudatoolkit 10.1.168 0 anaconda/pkgs/main
cudatoolkit 10.1.243 h74a9793_0 anaconda/pkgs/main
cudatoolkit 10.2.89 h74a9793_0 anaconda/pkgs/main
cudatoolkit 10.2.89 h74a9793_1 anaconda/pkgs/main
cudatoolkit 11.0.221 h74a9793_0 anaconda/pkgs/main
cudatoolkit 11.3.1
(tf2) PS C:\Users\chai> conda search cudnn
Loading channels: done
# Name Version Build Channel
cudnn 7.1.4 cuda8.0_0 anaconda/pkgs/main
cudnn 7.1.4 cuda9.0_0 anaconda/pkgs/main
cudnn 7.3.1 cuda10.0_0 anaconda/pkgs/main
cudnn 7.3.1 cuda9.0_0 anaconda/pkgs/main
cudnn 7.6.0 cuda10.0_0 anaconda/pkgs/main
cudnn 7.6.0 cuda10.1_0 anaconda/pkgs/main
cudnn 7.6.0 cuda9.0_0 anaconda/pkgs/main
cudnn 7.6.4 cuda10.0_0 anaconda/pkgs/main
cudnn 7.6.4 cuda10.1_0 anaconda/pkgs/main
cudnn 7.6.4 cuda9.0_0 anaconda/pkgs/main
cudnn 7.6.5 cuda10.0_0 anaconda/pkgs/main
cudnn 7.6.5 cuda10.1_0 anaconda/pkgs/main
cudnn 7.6.5 cuda10.2_0 anaconda/pkgs/main
cudnn 7.6.5 cuda9.0_0 anaconda/pkgs/main
cudnn 7.6.5 cuda9.2_0 anaconda/pkgs/main
cudnn 8.2.1 cuda11.3_0 anaconda/pkgs/main
经过折腾发现，可以search出结果了，但是安装的时候还是不行，卡在Solving environment:，然后就进入下面的情况了：
tf2) PS C:\Users\chai> conda install cudatoolkit=11.2.2 -c conda-forge
Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Collecting package metadata (repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: |
Found conflicts! Looking for incompatible packages.
This can take several minutes. Press CTRL-C to abort.
Examining icc_rt: 17%|██████████▉ | 17/99 [00:32<02:39, 1.94s/it]-Examining certifi: 31%|███████████████████▋ | 31/99 [01:11<01:06, 1.02it/s]-Examining h5py: 40%|██████████████████████████▋ | 40/99 [01:25<01:19, 1.34s/it]-Examining pyasn1: 53%|█████████████████████████████████▌ | 52/99 [01:42<00:54, 1.15s/it]/Examining cachetools: 62%|████████████████████████████████████▉ | 61/99 [01:56<01:03, 1.67s/it]-Examining zlib: 64%|██████████████████████████████████████████ | 63/99 [02:23<00:41, 1.15s/it]-Examining six: 86%|█████████████████████████████████████████████████████████▌ | 85/99 [03:21<01:00, 4.31s/it]-Examining cffi: 88%|██████████████████████████████████████████████████████████ | 87/99 [03:22<00:31, 2.67s/it]|Examining
不知道是不是python版本和 cudatoolkit版本不兼容，目前正在排查
看来你需要从其他渠道安装cudatoolkit 11.2和cudnn 8.1.0，比如从NVIDIA官网下载安装包，或者使用其他发行版提供的安装脚本。
问题已经解决了，排查结束了，是python3.8和 cudatoolkit11.2不兼容！需要python3.7才能安装 cudatoolkit11.2.2.....