How to disable low display brightness when power fail?
unga888 at yahoo.com
Tue Feb 4 14:31:42 UTC 2014
> From: "illoai at gmail.com" <illoai at gmail.com>
>To: Unga <unga888 at yahoo.com>
>Cc: "freebsd-questions at freebsd.org" <freebsd-questions at freebsd.org>
>Sent: Tuesday, February 4, 2014 12:16 PM
>Subject: Re: How to disable low display brightness when power fail?
>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).
There are no hw.acpi.video.X variables in this laptop:
sysctl -a | grep hw.acpi.video
This laptop uses Intel open source driver.
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