How to disable low display brightness when power fail?

Unga unga888 at
Tue Feb 4 09:55:30 UTC 2014

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.

Best regards

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