On 28 Oct 2001, Arne Caspari wrote:
> Hello,
>
> i want to change the colormap-entries of an 8-bpp PseudoColor
> mode. Unfortunately it does not work.
>
> I set up a collormap where every color is black and another one, where
> every color is yellow. After setting the video mode and clearing it
> with zeros, I install the black colormap, wait 3 seconds and then I
> install the yellow colormap and wait 3 seconds to see the result.
>
> I thought that I would then see a black screen and after 3 seconds I
> would see a yellow screen. But all I see is the black screen so the
> yellow colormap seems not to be installed.
>
> I have appended my source-code and would appreciate your help.
>
> Regards, Arne Caspari
>
You might want to try XFree86 CVS. There was some miscommunication
about how the XFree86 colormap layer worked and I believe earlier
versions of the "ati" driver had problems when the root window was depth
15 or 16 and trying to run a depth 8 DGA mode. If colormaps in
depth 8 DGA works when your main X desktop is depth 8 (using
your current setup) that's probably what the problem is. I
believe Marc fixed this a couple months ago. If your colormaps
don't work even when the main X desktop is in depth 8, it might
be a different problem.
Mark.
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