XFree86 vertical refresh rate.

dep dep
Mon May 17 11:59:40 PDT 2004


quoth M.W. Chang:
| How could I set the vertical refresh rate in /etc/XF86Config?
| Anyone got a modeline for 85Hz?
|
| Section "Monitor"
|          Identifier   "Monitor0"
|          VendorName   "Monitor Vendor"
|          ModelName    "Monitor Model"
|          HorizSync       30-70
|          VertRefresh     80-120
| EndSection

at what resolution?

in my experience, if you have *any* modelines that work with the 
monitor, you can alter the refresh rate by fiddling with the first 
number in the modeline, raising it in small increments until you get to 
a rate that doesn't work (presuming a modern monitor which dumps out 
before the smoke escapes), then backing off a little.

i've needed to do this a few times to *detune* things -- a 17-inch sony 
i had, which has now gone to my sister's house, reported some bad value 
to the xfree configurator, such that it's image would often jiggle and 
become unreadable. (hence, in part, my question to the group a couple 
weeks ago for anyone who had an XF86Config for a g-400.) in that case, 
i found moving the number *down* slightly fixed the problem; the 
monitor was apparently not quite up to specs.

i cooked up these, of which only the 1280x960 has had any real tuning, 
because it is the resilution being used:

Section "Monitor"
    Identifier  "FlatCRT 19-inch"
    HorizSync   30-86
    VertRefresh 48-120
    Modeline  "1600x1200" 186.00 1600 1664 1856 2160 1200 1201 1204 1250
    Modeline  "1280x1024" 142.72 1280 1312 1416 1664 1024 1027 1030 1064
    Modeline  "1280x960" 143.00 1280 1328 1432 1724 960 962 964 1002
    Modeline  "1152x864" 140.00 1152 1464 1592 1776 864 864 876 908
    Modeline  "1024x768" 123.00 1024 1056 1248 1440 768 771 781 802

i have no idea if this os of any help; i hope it is.
-- 
dep

Hippocratic oath: An ethical construct whose initial tenet, "first, do 
no harm," prohibits doctors from treating lawyers.


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