torch.version.cuda.split error

[Lier0]

System Info

python3.12
rocm6.3
amdgpu : gfx1030

Reproduction

$ python -m bitsandbytes

Could not load bitsandbytes native library: 'NoneType' object has no attribute 'split'
Traceback (most recent call last):
  File "/home/lier0/ia/ComfyUI/comfyui_env/lib64/python3.12/site-packages/bitsandbytes/cextension.py", line 85, in <module>
    lib = get_native_library()
          ^^^^^^^^^^^^^^^^^^^^
  File "/home/lier0/ia/ComfyUI/comfyui_env/lib64/python3.12/site-packages/bitsandbytes/cextension.py", line 64, in get_native_library
    cuda_specs = get_cuda_specs()
                 ^^^^^^^^^^^^^^^^
  File "/home/lier0/ia/ComfyUI/comfyui_env/lib64/python3.12/site-packages/bitsandbytes/cuda_specs.py", line 39, in get_cuda_specs
    cuda_version_string=(get_cuda_version_string()),
                         ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/lier0/ia/ComfyUI/comfyui_env/lib64/python3.12/site-packages/bitsandbytes/cuda_specs.py", line 29, in get_cuda_version_string
    major, minor = get_cuda_version_tuple()
                   ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/lier0/ia/ComfyUI/comfyui_env/lib64/python3.12/site-packages/bitsandbytes/cuda_specs.py", line 24, in get_cuda_version_tuple
    major, minor = map(int, torch.version.cuda.split("."))
                            ^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'split'

CUDA Setup failed despite CUDA being available. Please run the following command to get more information:

python -m bitsandbytes

Inspect the output of the command and see if you can locate CUDA libraries. You might need to add them
to your LD_LIBRARY_PATH. If you suspect a bug, please take the information from python -m bitsandbytes
and open an issue at: https://github.com/bitsandbytes-foundation/bitsandbytes/issues

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++ BUG REPORT INFORMATION ++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++ OTHER +++++++++++++++++++++++++++
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/home/lier0/ia/ComfyUI/comfyui_env/lib64/python3.12/site-packages/bitsandbytes/__main__.py", line 4, in <module> 
    main()
  File "/home/lier0/ia/ComfyUI/comfyui_env/lib64/python3.12/site-packages/bitsandbytes/diagnostics/main.py", line 51, in main
    cuda_specs = get_cuda_specs()
                 ^^^^^^^^^^^^^^^^
  File "/home/lier0/ia/ComfyUI/comfyui_env/lib64/python3.12/site-packages/bitsandbytes/cuda_specs.py", line 39, in get_cuda_specs
    cuda_version_string=(get_cuda_version_string()),
                         ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/lier0/ia/ComfyUI/comfyui_env/lib64/python3.12/site-packages/bitsandbytes/cuda_specs.py", line 29, in get_cuda_version_string
    major, minor = get_cuda_version_tuple()
                   ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/lier0/ia/ComfyUI/comfyui_env/lib64/python3.12/site-packages/bitsandbytes/cuda_specs.py", line 24, in get_cuda_version_tuple
    major, minor = map(int, torch.version.cuda.split("."))
                            ^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'split'

Expected behavior

>>> if torch.cuda.is_available() and torch.version.hip:
...     major, minor = map(int, list(torch.version.hip.split('.')[:2]))
...     print(major, minor)
... 
6 2