Fixed Frequency monitor Sony GDM-1963 - partial success

Fixed Frequency monitor Sony GDM-1963 - partial success

Post by Max Kubierschk » Sat, 08 Jul 2000 04:00:00



I obtain a stable picture with a very good resolution with one of the
following Modelines:

  Modeline "a" 135 1280 1400 1440 1800 1180 1185 1188 1195 -hsync -vsync
  Modeline "b" 135 1280 1400 1440 1800 1180 1185 1188 1196 -hsync -vsync
  ...
  Modeline "o" 135 1280 1400 1440 1800 1180 1185 1188 1208 -hsync -vsync
  Modeline "p" 135 1280 1400 1440 1800 1180 1185 1188 1209 -hsync -vsync
  Modeline "q" 135 1280 1400 1440 1800 1180 1185 1188 1190 -hsync -vsync
  Modeline "r" 135 1280 1400 1440 1800 1180 1185 1188 1191 -hsync -vsync
  Modeline "s" 135 1280 1400 1440 1800 1180 1185 1188 1192 -hsync -vsync
  Modeline "t" 135 1280 1400 1440 1800 1180 1185 1188 1193 -hsync -vsync
  Modeline "u" 135 1280 1400 1440 1800 1180 1185 1188 1194 -hsync -vsync

The problem is, that after a while the picture starts scrolling up
and that the correct mode is an other one every day.
My interpretation of this is, that

(a) the vertical sync signal isnt understood by the monitor and
(b) the vertical frequency of the monitor depends on temperature.

My temporary fix is the plurality of modes as shown above, such that
I can control the picture by switching modes: ctrl/alt/keypad-
accellerates picture upward and ctrl/alt/keypad+ accellerates picture
downward.
The annoying thing is, that it happens quite often, that the monitor
lies between the modes and therefore the picture cannot be prevented
from scrolling.
Another strange thing is, that when the monitor is very warm,
I see the picture jumping sometimes. Thus the vertical sync _does_
come through somehow.

Any hints?

Max
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1. Fixed Frequency Sony GDM-1950 Monitor

Does anyone have the specs for this monitor, or, better yet,
a working XF86Config file for the Mirage Z-128 2.25MB card.

Sony GDM-1950

Thanks.

--
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| Noah J. Cowan * University of Michigan  *  Department of Electrical |
| Engineering: Systems Division * Title: GSRA * Office: (313)936-2830 |  
| Lab: (313)763-1572 * http://www.eecs.umich.edu/~ncowan/ * Go Bucks! |
-----------------------------------------------------------------------

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