Intel Graphics: Difference between revisions

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== ~~Iris~~ ==

== Driver ==

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

~~To use the new Gallium <code>iris</code> driver, you can use the following in your system configuration:~~

== 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:

~~config~~ = {

hardware.graphics = {

~~environment.variables~~ = {

enable = true;

~~MESA_LOADER_DRIVER_OVERRIDE = "iris"~~;

extraPackages = with pkgs; [

};

... # your Open GL, Vulkan and VAAPI drivers

~~hardware~~.~~opengl~~.~~package = (pkgs~~.~~mesa.override {~~

vpl-gpu-rt # or intel-media-sdk for QSV

~~galliumDrivers = [ "nouveau" "virgl" "swrast" "iris" ];~~

];

~~}).drivers~~;

};

</syntaxHighlight>

~~Note that~~ you ~~might want additional entries~~ in <~~code~~>~~extraPackages~~</~~code~~>~~, for~~ example, to ~~enable [~~[~~Accelerated_Video_Playback|~~"~~accelerated video playback~~"]].

== 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:

$ 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>

~~(See~~ [~~https~~:~~//github.com/NixOS/nixpkgs/pull/65017 this GitHub thread~~] for context and explanation. <code>nouveau</code> is included to trigger the gallium-xa build, which is currently required because the nix derivation expects to copy the gallium-xa pkg-config files into place. Without <code>swrast</code> and/or <code>virgl</code>, it complains about needing softpipe/llvmpipe to build the <code>nine state tracker</code>.)

[[Category:Video]]

@@ Line 1: / Line 1: @@
-== Iris ==
+== Driver ==
+Refer to the [https://nixos.org/manual/nixos/stable/#sec-x11--graphics-cards-intel Intel Graphics drivers] section of the NixOS manual.
-To use the new Gallium <code>iris</code> driver, you can use the following in your system configuration:
+== 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>
-   config = {
+   hardware.graphics = {
-     environment.variables = {
+     enable = true;
-      MESA_LOADER_DRIVER_OVERRIDE = "iris";
+     extraPackages = with pkgs; [
-     };
+      ... # your Open GL, Vulkan and VAAPI drivers
-    hardware.opengl.package = (pkgs.mesa.override {
+       vpl-gpu-rt # or intel-media-sdk for QSV
-       galliumDrivers = [ "nouveau" "virgl" "swrast" "iris" ];
+     ];
-     }).drivers;
    };
 </syntaxHighlight>
-Note that you might want additional entries in <code>extraPackages</code>, for example, to enable [[Accelerated_Video_Playback|"accelerated video playback"]].
+== 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"
+: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>
-(See [https://github.com/NixOS/nixpkgs/pull/65017 this GitHub thread] for context and explanation. <code>nouveau</code> is included to trigger the gallium-xa build, which is currently required because the nix derivation expects to copy the gallium-xa pkg-config files into place. Without <code>swrast</code> and/or <code>virgl</code>, it complains about needing softpipe/llvmpipe to build the <code>nine state tracker</code>.)
+[[Category:Video]]