# CUDA.jl CUDA error 803

**URL:** <https://discourse.julialang.org/t/cuda-jl-cuda-error-803/94631>\
**Category:** GPU\
**Created:** [February 14, 2023, 4:02pm UTC](https://discourse.julialang.org/t/cuda-jl-cuda-error-803/94631 "2023-02-14T16:02:34Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Kieran\_Marray](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kieran_marray/32/35686_2.png) [@Kieran\_Marray](https://discourse.julialang.org/u/Kieran_Marray)\
**Post date:** [February 14, 2023, 4:02pm UTC](https://discourse.julialang.org/t/cuda-jl-cuda-error-803/94631/1 "2023-02-14T16:02:34Z")

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Hi

Have been trying to install CUDA.jl for the first time on Ubuntu 22.04 with a NVIDIA Quadro 400 GPU. I downloaded the correct drivers from nvidia (the 525 drivers), and julia from the main julia page as opposed to snap. CUDA.jl appears to download fine. When I run

`using CUDA`

I get the error code 803 CUDA\_ERROR\_SYSTEM\_DRIVER\_MISMATCH.

Any idea what is going wrong?

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**Author:** ![maleadt](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/maleadt/32/10097_2.png) [@maleadt](https://discourse.julialang.org/u/maleadt)\
**Post date:** [February 15, 2023, 7:10am UTC](https://discourse.julialang.org/t/cuda-jl-cuda-error-803/94631/2 "2023-02-15T07:10:52Z")

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Check `dmesg`; your `libcuda` (the library we use to interface with the driver) probably does not match `nvidia.ko` (the driver that was loaded by the kernel). You probably will have to reinstall the driver.

> [@Kieran\_Marray](#):
>
> I downloaded the correct drivers from nvidia (the 525 drivers)

That is not recommended. You should always use packages that are provided for your distribution, as mentioned in the docs: [Overview · CUDA.jl](https://cuda.juliagpu.org/stable/installation/overview/#NVIDIA-driver)

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<div class="post-metadata">

**Author:** ![Kieran\_Marray](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kieran_marray/32/35686_2.png) [@Kieran\_Marray](https://discourse.julialang.org/u/Kieran_Marray)\
**Post date:** [February 15, 2023, 8:50am UTC](https://discourse.julialang.org/t/cuda-jl-cuda-error-803/94631/3 "2023-02-15T08:50:13Z")

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Thanks (and thanks for replying so quickly) - totally wiping and reinstalling the driver through the CLI appears to work!