Thread: Colour depth issue

"Steve" <sbrown@chem.wayne.edu> wrote in message
news:1178316243.733529.88620@q75g2000hsh.googlegro ups.com...
>I have a Dell C840 notebook computer and am having some strange issues
> with colour depth when I change the screen resolution.
>
> Firstly I have a desktop wallpaper which has graduated fill over a
> large area and this is how why I first noticed the problem.
>
> When I setup my desktop initially, I set the screen resolution to
> 1600 x 1200.
>
> If I change the screen resolution to anything less, the apparent
> colour depth of the display drops dramitcally, even though Display
> settings still reports a colour depth of 32 bits. Changing the
> resolution back to 1600 x 1200 does not reverse the problem. Only if I
> log off and then long back in will the issue be resolved.
>
> How can I tell the colour depth has dropped, simply because my nice
> smooth graduated background now consists of ugly concentric circles.
> The problem is not just related to the wallpaper, but any image with a
> graduation in colour shows distinct stripes.
>
> Please note, this problems only appears to occur when I am logged into
> the machine in a non-administrative account. So my guess as the what
> the cause of the problem is would be that certain registry settings
> don't have the correct permissions to be modified by non-admins.
>
> Can anyone shed any light on this issue.


LCD monitors have a "natural" resolution, the one recommended by the
vendor. Go check the specs on yours to see what resolution is
recommended. Anything else results in graininess due to interpolation.