Collab version mismatch

[JaLnYn]

ERROR:numba.cuda.cudadrv.driver:Call to cuLinkAddData results in CUDA_ERROR_UNSUPPORTED_PTX_VERSION
---------------------------------------------------------------------------
CudaAPIError                              Traceback (most recent call last)
[/usr/local/lib/python3.11/dist-packages/numba_cuda/numba/cuda/cudadrv/driver.py](https://localhost:8080/#) in add_ptx(self, ptx, name)
   2806         try:
-> 2807             driver.cuLinkAddData(self.handle, enums.CU_JIT_INPUT_PTX,
   2808                                  ptxbuf, len(ptx), namebuf, 0, None, None)

12 frames
CudaAPIError: [222] Call to cuLinkAddData results in CUDA_ERROR_UNSUPPORTED_PTX_VERSION

During handling of the above exception, another exception occurred:

LinkerError                               Traceback (most recent call last)
[/usr/local/lib/python3.11/dist-packages/numba_cuda/numba/cuda/cudadrv/driver.py](https://localhost:8080/#) in add_ptx(self, ptx, name)
   2808                                  ptxbuf, len(ptx), namebuf, 0, None, None)
   2809         except CudaAPIError as e:
-> 2810             raise LinkerError("%s\n%s" % (e, self.error_log))
   2811 
   2812     def add_file(self, path, kind):

LinkerError: [222] Call to cuLinkAddData results in CUDA_ERROR_UNSUPPORTED_PTX_VERSION
ptxas application ptx input, line 9; fatal   : Unsupported .version 8.5; current version is '8.4'

:(

[PuppyQ08]

Yes, I got this error too. Besides, it worked fine just yesterday. It looks like the numba is upgraded to use PTX 8.5 while the Tesla T4 GPU (Compute compatibility 7.5) doesn't support PTX 8.5

[PuppyQ08]

It is a temporary issue in Colab. Please see this ticket: https://github.com/googlecolab/colabtools/issues/5081
When we use "numba -s", it showed the CUDA driver is 12.4 while the CUDA runtime version is 12.5. So it is not compatible.
Solution: type "Use fallback runtime version" in the command palette would switch back to the old version with CUDA runtime 12.2. It works for me now.