[ltp] xbacklight = 1?

[Arno Trautmann]

Hi,

I hope, this is the right list for this question and you can give me a 
hint; it’s about xbacklight:

I have a X61s, Arch Linux, using xbacklight. When I don’t use the 
machine for some minutes, the screen turns black. ok, great so far.
Returning to the keyboard, the screen turns bright, wonderful. But 
mostly it is going to brightnes level 100. Good, so I do a

xbacklight = 0

because I’m fine with the remaining brightnes at level 0. But if I enter 
this, the screen doesn‘t change at all, but stays bright. If I type a

xbacklight = 1,

it turns to level 1 and is dark. Now I can put it back to 100, and then 
putting it to 0 succeeds… this ist quite a strange thing I really would 
like to understand. Some kind of bug – but where? xbacklight, hardware 
or anything else? It’s not a serious problem, just a bit annoying.

man xbacklight doesn’t tell me something about such a thing…

Thanks,
Arno