Re: [Nix-dev] Nvidia & Cuda & Optimus - root required?

2017-05-12 Thread Marc Weber 
> Isn't there some /dev/* file representing the device that you can set
> permissions on? (Half guessing here...)
There are, but chmod 777 on /dev/nvidi* didn't help.

Also it worked on a desktop machine if I recall correctly.
So it eventually is optimus related.

Marc Weber
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Re: [Nix-dev] Nvidia & Cuda & Optimus - root required?

2017-05-12 Thread Bjørn Forsman 
On 12 May 2017 at 16:07, Marc Weber  wrote:
> Nvidia & Cuda:
>
> As root it works, as user it doesn't (even exporting the env from root).
> Easiest way to reproduce:
>
>   $(nix-build cudatoolkit)/extras/demo_suite/deviceQuery
>
>   Either outputs 'FAILED' or some info
>
> Has anybody a solution yet?

Isn't there some /dev/* file representing the device that you can set
permissions on? (Half guessing here...)

Best regards,
Bjørn Forsman
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[Nix-dev] Nvidia & Cuda & Optimus - root required?

2017-05-12 Thread Marc Weber 
Nvidia & Cuda:

As root it works, as user it doesn't (even exporting the env from root).
Easiest way to reproduce:

  $(nix-build cudatoolkit)/extras/demo_suite/deviceQuery

  Either outputs 'FAILED' or some info

Has anybody a solution yet?

Marc Weber
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