I think the problem is as follows:
As of xfree-3.3, XF86Setup generates the modeline for the 1024x768
resolution with a clock of 85 MHz instead of the 80 MHz previously used.
This is basically a good thing because you generally get higher
refreshing rates. However, they only could do this because they also
raised the maximum frequency of many graphics chips from 80 MHz to 85
MHz for 16 bpp, too. Unfortunately, for the Trio64 chip they still stick
to the old limit (they might have good reasons though) of 80 MHz, and
thus the modeline doesn't work in 16 bpp mode. I consider this a bug.
The fix is to use a modeline with 80 MHz clock frequency, e.g.:
Modeline "1024x768" 80.00 1024 1028 1164 1264 768 787 793 822
-hsync -vsync
Do not use this modeline blindly, it may burn your monitor if it has not
at least a horizontal frequency of 64 kHz!
Regards,
Andree
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| Institute of Geophysics phone: +49 40 4123 4389
ANDREE LEIDENFROST | University of Hamburg fax: +49 40 4123 5441
Geophysicist | Bundesstrasse 55 e-mail: [EMAIL PROTECTED]
| D-20146 Hamburg www: www.app-geoph.dkrz.de
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