How to disable low display brightness when power fail?

[illoai at gmail.com]

On 4 February 2014 04:55, Unga <unga888 at yahoo.com> wrote:
> Hi all
>
> I have a laptop running FreeBSD 9.2 and KDE4.
>
>
> When main A/C power fails, this laptop immediately reduces the display brightness. When power restores, it also immediately restore the full brightness.
>
> Because of this I cannot show a presentation without power.
>
> Therefore, how to disable becoming low bright when no main A/C power?
>
> I prefer a xorg.conf entry.

Have a look at acpi_video(4).

http://www.freebsd.org/cgi/man.cgi?query=acpi_video&sektion=4

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