On Sun, 23 Jun 2002, Rene Puls wrote:
> I am using a SONY SDM-M81 LCD panel together with a Radeon 8500 DDR card in
> 1280x1024 @ 24bpp mode. My XFree86 is version 4.2.0.
>
> As you can see, the gradient shown in the first picture is absolutely
> smooth (save for a few JPEG artifacts, maybe), while my display shows it
> as if it had just 64 colors, producing lots of vertical "bars".
>
> Mind you, the display is running in 24-bit color depth, so this shouldn't
> really happen. What is kind of strange is the fact that this happens
> *only* when my display is connected via the DVI connector of the graphics
> board. If I connect the VGA connector to the second input of my LCD and
> switch to it, the gradient becomes perfectly smooth. (No need to restart X
> or anything.) After switching back to DVI, the color bars appear again. By
> the way, this does not happen under Windows, so I guess it is not a
> hardware limitation.
Your config has
# Option "Dac6Bit" "False"
# Option "Dac8Bit" "True"
Since the VGA connector is giving the correct output, I don't think
you should need to uncomment these lines, but the DVI output is behaving
as if you had:
Option "Dac8Bit" "False"
or
Option "Dac6Bit" "True"
I guess that the DVI output isn't getting this right.
I don't have an 8500, or much time for this sort of thing, but *if*
I get around to it I'll see if it happens on a 7000 or I can see any
bugs in the code.
--
Dr. Andrew C. Aitchison Computer Officer, DPMMS, Cambridge
[EMAIL PROTECTED] http://www.dpmms.cam.ac.uk/~werdna
_______________________________________________
Xpert mailing list
[EMAIL PROTECTED]
http://XFree86.Org/mailman/listinfo/xpert
