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fix: add disclaimer about qt eglfs backend #155

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cshilwant merged 1 commit into from
Jan 30, 2025
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fix: add disclaimer about qt eglfs backend #155

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8 changes: 8 additions & 0 deletions source/linux/Foundational_Components/Graphics/Common/QT_Graphics_Framework.rst
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Expand Up @@ -31,6 +31,14 @@ provided with Qt. By default EGLFS will use the ``eglfs_kms`` backend.
The default ``eglfs_kms`` configuration file for Qt5 is located at
:file:`/etc/qt5/eglfs_kms_cfg.json`.

Please note that EGLFS backend is not smart enough to select a display device
automatically. One must be specified in the config file using the ``device``
key. If one is not specified, :file:`/dev/dri/card0` will be used, which can
either point at the GPU or the Display device depending on the order in which
the devices were initialized. We recommend using the :file:`/dev/dri/by-path/*`
path for a persistent device path. If an incorrect device was chosen, an error
like the following can appear: ``Failed to create display device (err=19)``.

For more information about Qt's EGLFS and using Qt5 in embedded
applications see:

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