我正在尝试检查 GPU 设备名称，但在执行此代码之后。我收到这个未知的运行时错误。请帮我解决这个问题并给出解决此错误的完整说明。谢谢。
(base) kumar@kumar:~$ conda activate pytorch
(pytorch) kumar@kumar:~$ python
Python 3.8.5 (default, Sep 4 2020, 07:30:14)
[GCC 7.3.0] :: Anaconda, Inc. on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import torch
>>> print(torch.__version__)
1.9.0a0+gitb39eeb0
>>> print(torch.version.cuda)
11.2
>>> print(torch.cuda.current_device())
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/kumar/anaconda3/envs/pytorch/lib/python3.8/site-packages/torch/cuda/__init__.py", line 430, in current_device
_lazy_init()
File "/home/kumar/anaconda3/envs/pytorch/lib/python3.8/site-packages/torch/cuda/__init__.py", line 170, in _lazy_init
torch._C._cuda_init()
RuntimeError: CUDA unknown error - this may be due to an incorrectly set up environment, e.g. changing env variable CUDA_VISIBLE_DEVICES after program start. Setting the available devices to be zero.
>>> exit()
这是输出nvcc -V
(pytorch) kumar@kumar:~$ nvcc -V nvcc: NVIDIA (R) Cuda 编译器驱动程序 版权所有 (c) 2005-2021 NVIDIA Corporation 基于 Sun_Feb_14_21:12:58_PST_2021 Cuda 编译工具构建，版本 11.2，V11.2.152 构建 cuda_11。 2.r11.2/compiler.29618528_0 (pytorch) kumar@kumar:~$
这是输出nvidia-smi
Thu Apr 8 15:04:49 2021
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 460.67 Driver Version: 460.39 CUDA Version: 11.2 |
|-------------------------------+----------------------+----------------------+
| 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 RTX 3070 Off | 00000000:01:00.0 On | N/A |
| 0% 38C P8 10W / 220W | 525MiB / 7982MiB | 0% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=============================================================================|
| 0 N/A N/A 1015 G /usr/lib/xorg/Xorg 70MiB |
| 0 N/A N/A 1542 G /usr/lib/xorg/Xorg 257MiB |
| 0 N/A N/A 1675 G /usr/bin/gnome-shell 89MiB |
| 0 N/A N/A 3560 G ...AAAAAAAAA= --shared-files 94MiB |
+-----------------------------------------------------------------------------+
但是，当我尝试运行此代码时：
print(torch.cuda.current_device())
我收到以下错误：
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/kumar/anaconda3/envs/pytorch/lib/python3.8/site-packages/torch/cuda/__init__.py", line 430, in current_device
_lazy_init()
File "/home/kumar/anaconda3/envs/pytorch/lib/python3.8/site-packages/torch/cuda/__init__.py", line 170, in _lazy_init
torch._C._cuda_init()
RuntimeError: CUDA unknown error - this may be due to an incorrectly set up environment, e.g. changing env variable CUDA_VISIBLE_DEVICES after program start. Setting the available devices to be zero.