Re: [gpm] [linux-pm] gnome's black light control for LCD displays

[Zhang Rui <rui zhang intel com>]

cc gnome-power-manager-list gnome org
cc intel-gfx lists freedesktop org

hmm, I think someone from these two mail lists may be interested in
this.

thanks,
rui

On Sun, 2009-05-10 at 10:34 +0800, Michael Brooks wrote:
> Hi everyone,
> 
> This is my first post and I really love Linux and the environment.  I
> am glad there are people that are working on both!
> 
> I know of a way to reduce power consumption on my Ubuntu laptop
> running Gnome.     The default screen saver is a "blank screen",
> however when the blank screen is displayed the back light is still on.
>    The way to test for this is by putting the machine in a very dark
> room  and you will be able to see the "Blank Screen"  glowing from the
> back light.
> 
> The easy fix would be to turn off the back light when the "Blank
> Screen" screen saver is activated by gnome.  A more difficult fix
> would be to detect if the screen is displaying only black and then to
> turn off the back light.  The 2nd is a more general purpose fix that
> could be handled by X and affect many different situations and all
> window manger's "Blank Screen" screen savers.   Every calorie of
> energy counts,  and every pound of CO2 that can be saved should be
> considered.
> 
> Thanks for the Green Linux effort!
> --Michael Brooks
> _______________________________________________
> linux-pm mailing list
> linux-pm lists linux-foundation org
> https://lists.linux-foundation.org/mailman/listinfo/linux-pm