I have been trying to create an environment to enable tensorflow, pytorch, etc.
I created a new environment <new_env> via Anaconda with following packages:
GPU: GeForce GTX 1660 Ti
GPU driver: 452.06
python 3.6
pytroch 1.4.0
cudatoolkit 10.0.130
cudnn 7.6.5
tensorflow 2.0.0
However, when I try to check the availability of the CUDA on jupyter notebook the following error is shown:


torch.cuda.device_count()


---------------------------------------------------------------------------
AssertionError                            Traceback (most recent call last)
 in 
----> 1 torch.cuda.get_device_name(0)
~\anaconda3\envs\ML\lib\site-packages\torch\cuda_init_.py in get_device_name(device)

302             if :attr:device is None (default).*
303     “”"*
–> 304     return get_device_properties(device).name

305 *
306 *

~\anaconda3\envs\ML\lib\site-packages\torch\cuda_init_.py in get_device_properties(device)

323 *
324 def get_device_properties(device):*
–> 325     _lazy_init()  # will define _get_device_properties and _CudaDeviceProperties

326     device = _get_device_index(device, optional=True)*
327     if device < 0 or device >= device_count():*

~\anaconda3\envs\ML\lib\site-packages\torch\cuda_init_.py in _lazy_init()

194             raise RuntimeError(*
195                 "Cannot re-initialize CUDA in forked subprocess. " + msg)*
–> 196         _check_driver()

197         torch._C._cuda_init()*
198         _cudart = _load_cudart()*

~\anaconda3\envs\ML\lib\site-packages\torch\cuda_init_.py in _check_driver()


92 def _check_driver():*



93     if not hasattr(torch._C, '_cuda_isDriverSufficient'):*



—> 94         raise AssertionError(“Torch not compiled with CUDA enabled”)


95     if not torch._C._cuda_isDriverSufficient():*



96         if torch._C._cuda_getDriverVersion() == 0:*



AssertionError: Torch not compiled with CUDA enabled

Hence, I updated my driver to CUDA11 and realised pytorch isn’t ready for CUDA 11 yet. Hence, I tried to uninstall the updates (via software uninstaller in control panel) and downgrade to 10.x version via conda install pytorch torchvision cudatoolkit=10.2 -c pytorch under the environment I created via Anaconda. As a result, it said CUDA version is conflicted with a LONG message of confliction:
_____________________________________________________________________-
UnsatisfiableError: The following specifications were found
to be incompatible with the existing python installation in your environment:
Specifications:



argon2-cffi -> python[version=’>=2.7,<2.8.0a0|>=3.5,<3.6.0a0’]*




bleach -> python[version=’>=3.8,<3.9.0a0’]*




brotlipy -> python[version=’>=2.7,<2.8.0a0|>=3.5,<3.6.0a0’]*




cryptography -> python[version=’<=3.3’]*




cupy -> python[version=’>=2.7,<2.8.0a0|>=3.8,<3.9.0a0’]*




grpcio -> python[version=’>=2.7,<2.8.0a0’]*




jinja2 -> python[version=’>=3.8,<3.9.0a0’]*




keras-applications -> python[version=’>=2.7,<2.8.0a0|>=3.8,<3.9.0a0’]*




keras-base -> python[version=’>=2.7,<2.8.0a0|>=3.8,<3.9.0a0’]*




keras-preprocessing -> python[version=’>=2.7,<2.8.0a0|>=3.8,<3.9.0a0’]*




mkl_random -> python[version=’>=2.7,<2.8.0a0’]*




numba -> python=3.4*




oauthlib -> python[version=’>=3.8,<3.9.0a0’]*




packaging -> python[version=’>=3.8,<3.9.0a0’]*




prometheus_client -> python[version=’>=3.8,<3.9.0a0’]*




pygments -> python[version=’>=3.8,<3.9.0a0’]*




pyrsistent -> python[version=’>=3.5,<3.6.0a0’]*




python-dateutil -> python[version=’>=3.8,<3.9.0a0’]*




pytorch -> python[version=’>=2.7,<2.8.0a0’]*




requests-oauthlib -> python[version=’>=3.8,<3.9.0a0’]*




testpath -> python[version=’>=3.8,<3.9.0a0’]*




torchvision -> python[version=’>=2.7,<2.8.0a0’]*




urllib3 -> python[version=’<=3.3’]*



Your python: python=3.6
If python is on the left-most side of the chain, that’s the version you’ve asked for.
When python appears to the right, that indicates that the thing on the left is somehow
not available for the python version you are constrained to. Note that conda will not
change your python version to a different minor version unless you explicitly specify
that.
The following specifications were found to be incompatible with a past
explicit spec that is not an explicit spec in this operation (pytorch):



cudatoolkit=10.2*




pytorch -> cudatoolkit[version=’>=10.0,<10.1|>=10.1,<10.2|>=10.2,<10.3|>=9.2,<9.3|>=9.0,<9.1|>=8.0,<8.1’]*




pytorch -> numpy[version=’>=1.11|>=1.11.3,<2.0a0|>=1.14.6,<2.0a0’]*




torchvision -> cudatoolkit[version=’>=10.0,<10.1|>=10.1,<10.2|>=10.2,<10.3|>=9.2,<9.3|>=9.0,<9.1’]*




torchvision -> numpy[version=’>=1.11’]*




torchvision -> pytorch==1.6.0 -> numpy[version=’>=1.11.3,<2.0a0|>=1.14.6,<2.0a0’]*




torchvision -> pytorch[version=‘1.2.0|1.3.0|1.3.1|1.4.0|1.5.0|1.5.1|1.6.0|>=1.1.0|>=1.0.0|>=0.4’]*




torchvision -> pytorch[version=’>=1.0.0’] -> cudatoolkit[version=’>=8.0,<8.1’]*



The following specifications were found to be incompatible with each other:
Output in format: Requested package -> Available versions
Package libmklml conflicts for:
tensorflow-estimator -> tensorflow-base[version=’>=2.1.0,<2.2.0a0’] -> libmklml[version=’>=2019.0.5’]
torchvision -> pytorch==1.6.0 -> libmklml
pytorch -> libmklml
tensorflow-base -> libmklml[version=’>=2018.0.3|>=2019.0.3|>=2019.0.5’]
tensorflow -> tensorflow-base==2.1.0=mkl_py37h230818c_0 -> libmklml[version=’>=2018.0.3|>=2019.0.3|>=2019.0.5’]

Shouldn’t the environment I created via anacond is different from the base? With the cudatoolkit 10.0.130 installed, I shouldn’t be using the CUDA 11. I am a totaly newbie on this. I really appreciate it if someone can help me out