# CUDA.jl not loading in julia 1.12.0

**URL:** https://discourse.julialang.org/t/cuda-jl-not-loading-in-julia-1-12-0/133022
**Category:** General Usage
**Created:** [October 9, 2025, 6:29pm UTC](https://discourse.julialang.org/t/cuda-jl-not-loading-in-julia-1-12-0/133022 "2025-10-09T18:29:20Z")
**Posts on this page:** 1
**Showing post:** 10

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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: [October 11, 2025, 5:57am UTC](https://discourse.julialang.org/t/cuda-jl-not-loading-in-julia-1-12-0/133022/10 "2025-10-11T05:57:02Z")

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CUDA.jl 1.12 compatibility is in the works. Try the master branch if you run into issues.

> [@Ferran\_Mazzanti](#):
>
> when opened julia 1.12.0 and issued the ‘using CUDA’ command, it just sits there doing nothing, essentially forever (20+ minutes waiting and still nothing)

Interrupt it (CTRL-C) and post the backtrace.

> [@Ferran\_Mazzanti](#):
>
> Ok, looks like there is a bug in the synchronization of parallel loading tasks… or something similar 🙂 At least that’s what claude anthropic told me. And he found the following workaround, which is to edit the .julia/config/startup.jl file and add the following line:
> 
> ENV[“JULIA\_DEBUG”] = “loading”

Don’t trust LLMs to debug issues like this. Adding debug logging only increases verbosity, and is not expected to be a valid workaround for anything.

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