Re: [iPAQ] screen brightness

Actually, if you look in the code to the kernel it "scales" the input
values for birghtness to reduce battery usage! ;)

        chris

On Sun, Sep 09, 2001 at 07:06:34PM -0700, Mark G. Saye wrote:
>
> I'm investigating why the screen brightness under Linux is so much less
> 'bright' than under WinCE.
>
> I'm comparing a 3650 (which has been running Familiar for 9 months or
> so) with a new 3670 (running Windows CE/Pocket PC).
>
> Is there any difference in hardware between the two models, or could the
> screen have deteriorated over time? Or is this purely a software issue?
>
> I took some screenshots when running WinCE on the old 3650 - the white
> values come out with RGB values of 248,252,248 respectively. I get the
> same results if I 'xsetroot -solid white' and then use the raw2ppm
> program in the Wiki iPaqScreenshots section. Presumably this is the
> limitation of a 12-bit display.
>
> I have set 'bl 1 1 255' but the Linux screen looks more like a 75% gray
> compared to WinCE.
>
> You can find a photo at:
> http://www.speakeasy.org/~msaye/ipaq/screens.jpg
>
> What's going on here?
>
> Thanks!
>
> Mark /
>
> --
> Mark G. Saye
> markgsaye@yahoo.com
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-- 
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
  cdm@qnx.com                  "The faster I go, the behinder I get."
  Chris McKillop                             -- Lewis Carroll --
  Software Engineer, QSSL
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