Set up Intel/Nvidia/AMD gpus

[Mic92]

We already load gpu drivers into the initrd, but we do not yet setup opengl/vulkan drivers.

[Mic92]

For nvidia we can detect the gpu chip generation and than decide if want the open or closed gpu driver.

We figured out that lspci has the gpu generation for nvidia in its first few characters encoded.

[geekodour]

I am getting the following with nixos-anywhere and facter:

error:
       … while calling the 'seq' builtin

         at /nix/store/m1szqwijms610n6325mwjswslha4nd92-source/lib/modules.nix:322:18:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          323|         _module = checked (config._module);

       … while calling the 'throw' builtin

         at /nix/store/m1szqwijms610n6325mwjswslha4nd92-source/lib/modules.nix:298:18:

          297|                     ''
          298|             else throw baseMsg
             |                  ^
          299|         else null;

       error: The option `hardware.graphics' does not exist. Definition values:
       - In `/nix/store/isph9via2616d4hf2ixavza3ig9wjk2c-source/modules/nixos/graphics.nix':
           {
             _type = "if";
             condition = true;
             content = {
               enable = {
           ...

is it related?

I am trying to deploy a hetzner vm, where I don't really care about graphics here. So unsure about this usecase

[Mic92]

@geekodour This option was introduced in nixpkgs-unstable but is not yet available in 24.05.
Fix in #45
We currently don't actively test nixos 24.05 compatibility, but we might start doing this with 24.11.

[Mic92]

We have now some support for AMD GPUs. For nvidia, we need to detect the gpu generation to figure out if we can use the open driver or not. For Intel we need to detect the iGPU generation as well to load the right opencl/opengl and vaapi driver.