mirror of
https://github.com/nix-community/home-manager
synced 2024-11-23 11:39:46 +01:00
81 lines
3.4 KiB
Markdown
81 lines
3.4 KiB
Markdown
# GPU on non-NixOS systems {#sec-usage-gpu-non-nixos}
|
|
|
|
To access the GPU, programs need access to OpenGL and Vulkan libraries. While
|
|
this works transparently on NixOS, it does not on other Linux systems. A
|
|
solution is provided by [NixGL](https://github.com/nix-community/nixGL), which
|
|
can be integrated into Home Manager.
|
|
|
|
To enable the integration, import NixGL into your home configuration, either as
|
|
a channel, or as a flake input passed via `extraSpecialArgs`. Then, set the
|
|
`nixGL.packages` option to the package set provided by NixGL.
|
|
|
|
Once integration is enabled, it can be used in two ways: as Nix functions for
|
|
wrapping programs installed via Home Manager, and as shell commands for running
|
|
programs installed by other means (such as `nix shell`). In either case, there
|
|
are several wrappers available. They can be broadly categorized
|
|
|
|
- by vendor: as Mesa (for Free drivers of all vendors) and Nvidia (for
|
|
Nvidia-specific proprietary drivers).
|
|
- by GPU selection: as primary and secondary (offloading).
|
|
|
|
For example, the `mesa` wrapper provides support for running programs on the
|
|
primary GPU for Intel, AMD and Nouveau drivers, while the `mesaPrime` wrapper
|
|
does the same for the secondary GPU.
|
|
|
|
**Note:** when using Nvidia wrappers together with flakes, your home
|
|
configuration will not be pure and needs to be built using `home-manager switch
|
|
--impure`. Otherwise, the build will fail, complaining about missing attribute
|
|
`currentTime`.
|
|
|
|
Wrapper functions are available under `config.lib.nixGL.wrappers`. However, it
|
|
can be more convenient to use the `config.lib.nixGL.wrap` alias, which can be
|
|
configured to use any of the wrappers. It is intended to provide a customization
|
|
point when the same home configuration is used across several machines with
|
|
different hardware. There is also the `config.lib.nixGL.wrapOffload` alias for
|
|
two-GPU systems.
|
|
|
|
Another convenience is that all wrapper functions are always available. However,
|
|
when `nixGL.packages` option is unset, they are no-ops. This allows them to be
|
|
used even when the home configuration is used on NixOS machines. The exception
|
|
is the `prime-offload` script which ignores `nixGL.packages` and is installed
|
|
into the environment whenever `nixGL.prime.installScript` is set. This script,
|
|
which can be used to start a program on a secondary GPU, does not depend on
|
|
NixGL and is useful on NixOS systems as well.
|
|
|
|
Below is an abbreviated example for an Optimus laptop that makes use of both
|
|
Mesa and Nvidia wrappers, where the latter is used in dGPU offloading mode. It
|
|
demonstrates how to wrap `mpv` to run on the integrated Intel GPU, wrap FreeCAD
|
|
to run on the Nvidia dGPU, and how to install the wrapper scripts. It also wraps
|
|
Xonotic to run on the dGPU, but uses the wrapper function directly for
|
|
demonstration purposes.
|
|
|
|
```nix
|
|
{ config, lib, pkgs, nixgl, ... }:
|
|
{
|
|
nixGL.packages = nixgl.packages;
|
|
nixGL.defaultWrapper = "mesa";
|
|
nixGL.offloadWrapper = "nvidiaPrime";
|
|
nixGL.installScripts = [ "mesa" "nvidiaPrime" ];
|
|
|
|
programs.mpv = {
|
|
enable = true;
|
|
package = config.lib.nixGL.wrap pkgs.mpv;
|
|
};
|
|
|
|
home.packages = [
|
|
(config.lib.nixGL.wrapOffload pkgs.freecad)
|
|
(config.lib.nixGL.wrappers.nvidiaPrime pkgs.xonotic)
|
|
];
|
|
}
|
|
```
|
|
|
|
The above example assumes a flake-based setup where `nixgl` was passed from the
|
|
flake. When using channels, the example would instead begin with
|
|
|
|
```nix
|
|
{ config, lib, pkgs, ... }:
|
|
{
|
|
nixGL.packages = import <nixgl> { inherit pkgs; };
|
|
# The rest is the same as above
|
|
...
|
|
```
|