how to turn off backlight in console (without any X server)

From	Laurent Debian <laurent.debian@gmail.com>
Newsgroups	linux.debian.user
Subject	how to turn off backlight in console (without any X server)
Date	2016-11-01 14:30 +0100
Message-ID	<syHix-MM-9@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hi all,

I would like to turn off the backlight completly on a  mac book pro 2008
(sid).
I don't have any x server.  Does it explains this error ?

>  xbacklight -set 10
> RANDR Query Version returned error -1
>

the graphic card is
02:00.0 VGA compatible controller: NVIDIA Corporation C79 [GeForce 9400M]
(rev b1)
nouveau is loaded by the kernel.

Any way to turn off the backlight without installing  X woudl be greatly
appreciated.

Cheers,
Laurent.

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how to turn off backlight in console (without any X server) Laurent Debian <laurent.debian@gmail.com> - 2016-11-01 14:30 +0100
  Re: how to turn off backlight in console (without any X server) <tomas@tuxteam.de> - 2016-11-01 14:50 +0100
    Re: how to turn off backlight in console (without any X server) Laurent Debian <laurent.debian@gmail.com> - 2016-11-08 12:00 +0100
      Re: how to turn off backlight in console (without any X server) tomas@tuxteam.de - 2016-11-08 14:10 +0100
        Re: how to turn off backlight in console (without any X server) Laurent Debian <laurent.debian@gmail.com> - 2016-11-08 14:20 +0100

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