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Old 12-13-2002, 08:28 AM   #1
zokik
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Monitor: refresh rate


When the monitor and video card were detected and configured automatically, refresh rate (frequency) was set only as an interval, eg. 50 - 120 Hz, not as a value, eg. 85 Hz.

How do I set the frequency to, for example, 85 Hz? And how can I check the actual frequency? I think it is way too low at the moment, because there is visible flickering at some parts of the screen.

My video card: nvidia geforce 2
My monitor: samsung syncmaster 957 DF
Distro: Red hat 8.0

I already installed nvidia driver (as it was suggested in some other threads here), but don't see any difference except the startup logo.
 
Old 12-13-2002, 08:29 AM   #2
acid_kewpie
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my preferred way is to use http://koala.ilog.fr/cgi-bin/nph-colas-modelines to generate modelines for whatever arbitrary frequency you want and manualy add them.
 
Old 12-13-2002, 08:34 AM   #3
Thymox
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You can check the actual frequencies being used by running xvidtune (among others). In order to change the settings, however, you will need to edit the file /etc/X11/XF86Config-4 and change the entried under Section "monitor".

HTH
 
Old 12-13-2002, 09:32 AM   #4
zokik
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acid_kewpie: what do I type for minimum of the max bandwidth of your graphic card (or dot clock) and the max bandwidth of your monitor (in Mhz) ? At samsung site and nvidia's site there is only *one* single bandwidth, 2.7 GB/s for nvidia geforce mx 400 and 250 MHz for my monitor.

Would it be ok if I put 250 for max bandwidth and leave default (20) for min bandwidth?

And where shall I put the lines I get at that page? It says in the ModeLines section, but I dont have it in my XF86Config.
 
Old 12-13-2002, 12:19 PM   #5
zokik
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Never mind. I found out the refresh rate is already 85 Hz (with xvidtune, thanx to Thymox). It seems there are problems with higher resolution. I switched from 1280 x 1024 to 1280 x 960 (the flickering was still there) and then to 1152 x 864 @ 85 Hz. At this resolution it's ok.

I still don't quite get it, because in WinXP the picture is fine at 1280 x 1024 @ 85 Hz.
 
  


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