[Nix-dev] nvidia proprietary / i7 notebook - does not start

[Arseniy Seroka]

I think it should detect such things. Can you create a patch please?

On 11 May 2017 14:10, "Marc Weber" <marco-oweber at gmx.de> wrote:

>
> This worked, almost:
>
>     ({config, pkgs, ...}: {
>       hardware.bumblebee.enable = true;
>       hardware.bumblebee.connectDisplay = true;
>       hardware.bumblebee.driver = "nvidia";
>       hardware.bumblebee.group = "users";
>
>       hardware.opengl.extraPackages = [ pkgs.vaapiIntel ];
>       services.xserver.videoDrivers = ["intel nvidia"];
>       services.xserver.deviceSection = ''
>         BusID "PCI:3:0:0"
>         BoardName "GeForce 940MX"
>       '';
>     })
>
>   (Thanks to github.com/yamafaktory/nixos-configuration)
>
>
> After applying the GDM patch (.66 nivdia driver), I can start X with the
> configuratino above, and glxgears -info shows 79 and 780
> fpms/sec depending on whether optirun was used. nvidia shows intel or
> nvidia.
>
>
> nix-shell -p python36Packages.tensorflowWithCuda
> then optirun python on
>
>   import tensorflow as tf
>   # Creates a graph.
>   a = tf.constant([1.0, 2.0, 3.0, 4.0, 5.0, 6.0], shape=[2, 3], name='a')
>   b = tf.constant([1.0, 2.0, 3.0, 4.0, 5.0, 6.0], shape=[3, 2], name='b')
>   c = tf.matmul(a, b)
>   # Creates a session with log_device_placement set to True.
>   sess = tf.Session(config=tf.ConfigProto(log_device_placement=True))
>   # Runs the op.
>   print(sess.run(c))
>
> still shows CPU. The nix-shell command worked on a desktop, the test
> script worked on ububntu on the same machine. So there is still a small
> thing left to explore, but I do no longer have to reboot :)
>
> Thank you very much for helping me.
>
> Should a nixos-hardware-scan be able to detect such cases and write a
> configuration like above? Then a nixos-rebuild boot/switch could
> 'regenerate' the config and warn if your system doesn't match what nixos
> expected. Then you can review changes and things just work ?
> If there are preferences to be choosen such as nvidia vs nouveau such
> choice could be remembered ?
>
> Marc Weber
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