Very Computer

Hello,

I have a Miro 12SD videocard (VLB) installed and I'm runnning XFree86
3.1.2 (S3-server). I upgraded my graphics card from 1 MByte to 2 MByte
video ram and wanted to start X in 16 bpp mode.

As far as I understand videotimings etc., the available color depth
does not depend on the mode line entries. In other words, a
Modeline that works properly in 8 bpp mode MUST also work properly in
16 bpp mode, provided that enough videoram is available.

But when I start the server (startx -- -bpp 16) using a Modeline that
works ok in 8 bpp mode, the screen starts to flicker and parts of
windows appear twice on the screen; in other words there's a screen
full of garbage. A solution seems to be the reduction of the
resolution from 1024x768 to 800x600 or to switch to an interlaced
mode.

Does anyone understand this?
Did I missunderstand or forget something or is this a bug in the S3
server?

Thanx for any answers and comments,

                            Rainer

--

*** ____ ******* . * . ******** Dipl.-Ing. Rainer Menzner *********************
   ( /  \       /|  /|          Ruhr-Universitaet Bochum  
    /    |     / | / |          Institut fuer Neuroinformatik
   /____/     /  |/  |  __      D-44780 Bochum, Germany
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********************** /--) *** Tel. +49-234/700-7978 *************************

There are a few bug fixes that are already done to the latest beta
versions of several xservers that fixes the flickering problem in 16,
32 modes. These betas have a expiration date.  So you might want to wait
for the final version of your xserver to come out.
Check out http://www.xfree86.org to see if your prob. happens to be one
of the bug fixes.