Maybe try something like this:
```julia
julia> using CUDA
julia> CUDA.set_runtime_version!(v"11.8")
```
That came from
[https://cuda.juliagpu.org/stable/installation/overview/#CUDA-toolkit](https://cuda.juliagpu.org/stable/installation/overview/#CUDA-toolkit)
Otherwise, @maleadt would probably know best.
---
### Author:  [@gdalle](https://discourse.julialang.org/u/gdalle)
#### Post date: [July 8, 2023, 6:28am UTC](https://discourse.julialang.org/t/cant-get-cuda-jl-to-see-cuda-in-ubuntu/101340/6 "2023-07-08T06:28:28Z")
I remember having had to downgrade my driver for CUDA.jl to work
---
### Author:  [@maleadt](https://discourse.julialang.org/u/maleadt)
#### Post date: [July 8, 2023, 8:21am UTC](https://discourse.julialang.org/t/cant-get-cuda-jl-to-see-cuda-in-ubuntu/101340/7 "2023-07-08T08:21:21Z")
That shouldn’t ever be required.
What does `nvidia-smi` report?
---
### Author:  [@taotree](https://discourse.julialang.org/u/taotree)
#### Post date: [July 8, 2023, 12:58pm UTC](https://discourse.julialang.org/t/cant-get-cuda-jl-to-see-cuda-in-ubuntu/101340/8 "2023-07-08T12:58:49Z")
I added the nvidia-smi output to the original post.
---
### Author:  [@taotree](https://discourse.julialang.org/u/taotree)
#### Post date: [July 8, 2023, 3:16pm UTC](https://discourse.julialang.org/t/cant-get-cuda-jl-to-see-cuda-in-ubuntu/101340/9 "2023-07-08T15:16:03Z")
I appreciate the help and suggestions. I think I had just gotten the drivers into a bad state or something. I did a clean reinstall of Ubuntu on the machine, used the standard Ubuntu “Additional Software” way of selecting the nvidia driver, and now it’s working.
---
### Author:  [@maleadt](https://discourse.julialang.org/u/maleadt)
#### Post date: [July 8, 2023, 8:36pm UTC](https://discourse.julialang.org/t/cant-get-cuda-jl-to-see-cuda-in-ubuntu/101340/10 "2023-07-08T20:36:34Z")
Maybe you installed/precompiled CUDA.jl before you had the NVIDIA driver set-up? In that case, this would be [Runtime not re-selected after driver upgrade · Issue #1877 · JuliaGPU/CUDA.jl · GitHub](https://github.com/JuliaGPU/CUDA.jl/issues/1877)
---
### Author:  [@sob](https://discourse.julialang.org/u/sob)
#### Post date: [August 28, 2023, 8:28pm UTC](https://discourse.julialang.org/t/cant-get-cuda-jl-to-see-cuda-in-ubuntu/101340/11 "2023-08-28T20:28:27Z")
For `CUDA` under Linux, should one use `nouveau` or the proprietary NVidia driver? Does it make a difference as far as `CUDA` is concerned?
---
### Author:  [@maleadt](https://discourse.julialang.org/u/maleadt)
#### Post date: [August 28, 2023, 8:42pm UTC](https://discourse.julialang.org/t/cant-get-cuda-jl-to-see-cuda-in-ubuntu/101340/12 "2023-08-28T20:42:29Z")
You need the NVIDIA proprietary driver, not nouveau. In fact, you should blacklist nouveau, as loading it will break the NVIDIA driver (such a blacklist is provided automatically by most distros).
For the sake of accuracy: there’s also an open driver by NVIDIA nowadays, and that driver also works with CUDA.jl. However, it still requires `nvidia-utils` providing `libcuda.so`, and that part is still closed-source.
---
### Author:  [@sob](https://discourse.julialang.org/u/sob)
#### Post date: [August 29, 2023, 10:42am UTC](https://discourse.julialang.org/t/cant-get-cuda-jl-to-see-cuda-in-ubuntu/101340/13 "2023-08-29T10:42:53Z")
Thank you. I was curious as my 1.9 install is fine, however my 1.10-beta2 throws a warning during install (which doesn’t prevent `CUDA.functional()` from returning `true`):
```julia
1 dependency had warnings during precompilation:
┌ FluxCUDAcuDNNExt [a1ab010e-6f71-51d6-acc8-fb8bfa4c0f92]
│ [pid 58614] waiting for IO to finish:
│ TYPE[FD/PID] @UV_HANDLE_T->DATA
│ timer @0x299b690->0x7f567b156440
└
```
---
### Author:  [@ufechner7](https://discourse.julialang.org/u/ufechner7)
#### Post date: [August 29, 2023, 11:44am UTC](https://discourse.julialang.org/t/cant-get-cuda-jl-to-see-cuda-in-ubuntu/101340/14 "2023-08-29T11:44:46Z")
This is to be expected and will hopefully be fixed in the final version of 1.10.
---
### Author:  [@sob](https://discourse.julialang.org/u/sob)
#### Post date: [October 4, 2023, 1:50pm UTC](https://discourse.julialang.org/t/cant-get-cuda-jl-to-see-cuda-in-ubuntu/101340/15 "2023-10-04T13:50:19Z")
I was hoping for `beta3` to fix this but I’ll have to be more patient!
---
### Author:  [@ufechner7](https://discourse.julialang.org/u/ufechner7)
#### Post date: [October 4, 2023, 4:41pm UTC](https://discourse.julialang.org/t/cant-get-cuda-jl-to-see-cuda-in-ubuntu/101340/16 "2023-10-04T16:41:40Z")
>
>
> This increases the delay slightly before checking whether all I/O
> tasks have fin…ished. This may reduce the number of "spurious" warnings
> during precompilation.
>
> Fixes #50873
---
### Author:  [@sob](https://discourse.julialang.org/u/sob)
#### Post date: [October 4, 2023, 4:55pm UTC](https://discourse.julialang.org/t/cant-get-cuda-jl-to-see-cuda-in-ubuntu/101340/17 "2023-10-04T16:55:32Z")
Thanks for the heads up