View source for Intel Graphics

== Driver ==
Refer to the [https://nixos.org/manual/nixos/stable/#sec-x11--graphics-cards-intel Intel Graphics drivers] section of the NixOS manual.

== Video acceleration ==

To enable hardware (GPU) accelerated video decoding and encoding you need to add additional entries in <code>hardware.graphics.extraPackages</code> (see [[Accelerated_Video_Playback|accelerated video playback]]).

== Quick Sync Video ==

Intel Quick Sync Video (QSV) is a hardware accelerated media conversion framework for Intel GPUs.
Applications that can be accelerated using QSV include OBS Studio and ffmpeg.

QSV support can be used through either [https://github.com/Intel-Media-SDK/MediaSDK Intel Media SDK] or [https://github.com/intel/libvpl Intel VPL]. Intel VPL supersedes the now deprecated Media SDK.

Both libraries dispatch to a backing implementation that is different depending on the GPU generation at runtime. You need to add either <code>intel-media-sdk</code> or <code>vpl-gpu-rt</code> (previously <code>onevpl-intel-gpu</code>) to <code>hardware.graphics.extraPackages</code>. You can check the [https://github.com/intel/libvpl?tab=readme-ov-file#dispatcher-behavior-when-targeting-intel-gpus this] table to decide whether you need the Media SDK or VPL GPU runtime.

Sample configuration:
<syntaxHighlight lang=nix>
  hardware.graphics = {
    enable = true;
    extraPackages = with pkgs; [
      ... # your Open GL, Vulkan and VAAPI drivers
      vpl-gpu-rt # or intel-media-sdk for QSV
    ];
  };
</syntaxHighlight>

== 12th Gen (Alder Lake) ==

The X Server may fail to start with the newer 12th generation, Alder Lake, iRISxe integrated graphics chips. If this is the case, you can give the kernel a hint as to what driver to use. First confirm the graphic chip's device ID by running in a terminal:

<syntaxHighlight lang=console>
$ nix-shell -p pciutils --run "lspci -nn | grep VGA"
00:02.0 VGA compatible controller [0300]: Intel Corporation Alder Lake-UP3 GT2 [Iris Xe Graphics] [8086:46a8] (rev 0c)
</syntaxHighlight>

In this example, "46a8" is the device ID. You can then add this to your configuration and reboot: 

<pre>boot.kernelParams = [ "i915.force_probe=<device ID>" ];</pre>

[[Category:Video]]