acpi_video(4): mention that acpi_video should be loaded after any drm driver
When not adhering to this order, brightness sysctl's do not show up on some laptop. Submitted by: driesm.michiels@gmail.com Reviewed by: uqs Differential Revision: https://reviews.freebsd.org/D26073
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2020-12-20 02:59:44 +00:00
svn path=/head/; revision=367328
@ -63,6 +63,15 @@ Preset brightness level to be used in economy mode.
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Defaults for these variables can be set in
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.Xr sysctl.conf 5 ,
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which is parsed at boot-time.
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.Sh COMPATIBILITY
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In order for
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.Nm
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to attach correctly,
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.Nm
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should be loaded after any of the DRM kernel modules.
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This can be achieved by setting the correct order in
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.Xr rc.conf 5
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using the kld_list directive.
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.Sh SEE ALSO
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.Xr acpi 4 ,
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.Xr loader.conf 5 ,
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