nixos-hardware/common/gpu/nvidia.nix
Thiago Kenji Okada 9194b8e949 nvidia: remove -a flag from exec
The `-a` from exec sets the `$0` from the process. So `exec -a "$0"`
would set the name of the new process to `nvidia-offload` (the name of
the script), however this is causing issues with a few programs that try
to interpret `$0` in a special way. For example, see `wine`:

```
$ nvidia-offload /nix/store/zhv91s26gsrl1w8yn9800xd03a31r3wj-wine-osu-7.0/bin/wine .osu/drive_c/osu/osu\!.exe
/nix/store/zhv91s26gsrl1w8yn9800xd03a31r3wj-wine-osu-7.0/bin/nvidia-offload: could not open
```

What I think `wine` is doing here is trying to re-exec `wine` again, but
to do so it tries to figure out the original call of wine by readind `$0`,
and will fail in this case because the `$0` was changed because of the
`nvidia-offload` script using `-a` flag, as explained above.

Instead, let's simplify this. There is no good reason to rename the `$0`
from the script anyway (it just sets a few environment variables), so let's
just remove it. We may lose the ability to know if the command is being
offloaded, but I think having more commands to work is a good trade-off.
2022-06-24 23:45:31 +01:00

27 lines
758 B
Nix

{ lib, pkgs, ... }:
# This creates a new 'nvidia-offload' program that runs the application passed to it on the GPU
# As per https://nixos.wiki/wiki/Nvidia
let
nvidia-offload = pkgs.writeShellScriptBin "nvidia-offload" ''
export __NV_PRIME_RENDER_OFFLOAD=1
export __NV_PRIME_RENDER_OFFLOAD_PROVIDER=NVIDIA-G0
export __GLX_VENDOR_LIBRARY_NAME=nvidia
export __VK_LAYER_NV_optimus=NVIDIA_only
exec "$@"
'';
in
{
services.xserver.videoDrivers = lib.mkDefault [ "nvidia" ];
environment.systemPackages = [ nvidia-offload ];
hardware.nvidia.prime = {
offload.enable = lib.mkDefault true;
# Hardware should specify the bus ID for intel/nvidia devices
};
hardware.opengl.extraPackages = with pkgs; [
vaapiVdpau
];
}