How to turn off the backlight?

[Mike Hunter]

On May 22, "Pierre-Luc Drouin" wrote:

> Yes, I have it. But I thought there was a way to turn the backlight off 
> from the terminal?

I have had some success with:

`xset dpms force off`

But for whatever reason, my dell D800 won't turn the backlight off in X,
only when running text-only.  You could work around this by switching to
a different console right before sleep, but again my dell has another
problem where it won't go *back* to video mode once it's been there; i.e.
the screen whites out and the box crashes.  Maybe these are all nvidia
driver issues, which I have to use to address the fact that an external
monitor won't work with the nv driver....:|

Mike