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Merge pull request #91261 from rnhmjoj/intel

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nixos/doc: add section on Intel DDX drivers
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Michele Guerini Rocco 2020-06-23 11:29:38 +02:00 committed by GitHub
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nixos/doc/manual/configuration/x-windows.xml
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@ -96,6 +96,47 @@
The options are named identically for all other display managers.
</para>
</simplesect>
<simplesect xml:id="sec-x11--graphics-cards-intel">
<title>Intel Graphics drivers</title>
<para>
There are two choices for Intel Graphics drivers in X.org:
<literal>modesetting</literal> (included in the <package>xorg-server</package> itself)
and <literal>intel</literal> (provided by the package <package>xf86-video-intel</package>).
</para>
<para>
The default and recommended is <literal>modesetting</literal>.
It is a generic driver which uses the kernel
<link xlink:href="https://en.wikipedia.org/wiki/Mode_setting">mode setting</link>
(KMS) mechanism. It supports Glamor (2D graphics acceleration via OpenGL)
and is actively maintained but may perform worse in some cases (like in old chipsets).
</para>
<para>
The second driver, <literal>intel</literal>, is specific to Intel GPUs,
but not recommended by most distributions: it lacks several modern features
(for example, it doesn't support Glamor) and the package hasn't been officially
updated since 2015.
</para>
<para>
The results vary depending on the hardware, so you may have to try both drivers.
Use the option <xref linkend="opt-services.xserver.videoDrivers"/> to set one.
The recommended configuration for modern systems is:
<programlisting>
<xref linkend="opt-services.xserver.videoDrivers"/> = [ "modesetting" ];
<xref linkend="opt-services.xserver.useGlamor"/> = true;
</programlisting>
If you experience screen tearing no matter what, this configuration was
reported to resolve the issue:
<programlisting>
<xref linkend="opt-services.xserver.videoDrivers"/> = [ "intel" ];
<xref linkend="opt-services.xserver.deviceSection"/> = ''
Option "DRI" "2"
Option "TearFree" "true"
'';
</programlisting>
Note that this will likely downgrade the performance compared to
<literal>modesetting</literal> or <literal>intel</literal> with DRI 3 (default).
</para>
</simplesect>
<simplesect xml:id="sec-x11-graphics-cards-nvidia">
<title>Proprietary NVIDIA drivers</title>
<para>