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Old 05-05-2002, 09:14 PM   #1
Korshun
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Registered: Apr 2002
Location: Sydney, Australia
Distribution: Fedora Core 6
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Setting exact refresh rate


Hello all,

I just want to know how to set the exact monitor refresh rate, eg specifically enter something like 79.9kHz/75Hz instead of specifying the range of refresh rate values... I use xf86config to create the config file and Xconfigurator to set things up, but the refresh rate still ends up a bit too low for my liking (eyes get tired very easily...). Can someone help me out? At the moment, I'm running 1024x768 with ~69kHz/85Hz (horizontal/vertical, or is it the other way around?) With windows, I could go ~75kHz/85Hz on the same resolution, if not higher. Any ideas on how I could specify the refresh rate?

I know this topic has been discussed a fair bit on the forums, but I just couldn't find one that dealt with setting a specific rate. My apologies if I have missed something.

Regards,
Michael.
 
Old 05-05-2002, 10:01 PM   #2
taz.devil
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Registered: Nov 2001
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What you are talking about doing is writing your own modelines to the /etc/X11/XF86Conf-4 or XF86Config file in the monitor section. I personally don't but that is where you will do it. If you search for modelines you will probably come up with plenty to work with.
 
Old 05-06-2002, 04:20 AM   #3
Korshun
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Registered: Apr 2002
Location: Sydney, Australia
Distribution: Fedora Core 6
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Hey taz,

Thank you for your reply... could you be a little more specific? I'm a newbie to Linux, so the more detail, the better. I'm looking at /etc/X11/XF86Config file (no Conf-4 file there) and I can see all these monitor settings like, for example:

# 1024x768 @ 70 Hz, 56.5 kHz hsync
Modeline "1024x768" 75 1024 1048 1184 1328 768 771 777 806 -hsync -vsync

Thing I don't get is - how do I select them? There are lots of settings listed, but I can't find anywhere where it explicitly states which one I should be using.

BTW, the monitor I am using is a DELL D1025HT. Thanks in advance,

Michael.
 
Old 05-06-2002, 06:41 AM   #4
Aussie
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What you need is the Colas Xfree Modeline Generator, (make sure you have your hardware specs handy).
 
Old 05-06-2002, 07:58 AM   #5
Korshun
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Registered: Apr 2002
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Distribution: Fedora Core 6
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Aussie, thanks for your reply but that site doesn't work... I give it all my specs and it just takes me to a blank page

Any other ideas? I'm using windows (yeah yeah, I know...) now and the monitor config screen shows 77.2kHz / 85Hz at 1152 x 864. In Linux, the best configuration I've been able to reach so far is 65khz /85Hz at 1024 x 768, but that resolution is a bit too low for my liking. I can also go for 80kHz / 75Hz at 1280 x 1024, but the refresh rate is a bit too low still. For a resolution of 1152 x 864 in Linux, the refresh combination is something like 60kHz / 65Hz, which seems a bit weird. I'm no expert with these settings, but shouldn't there be some sort of trade-off? Shouldn't I be able to have the same resolution and refresh rate for Linux as I do with windows?

Ideas people? Any comments would be very appreciated.

Korshun.
 
Old 05-06-2002, 08:25 AM   #6
Aussie
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It works fine for me (using konqueror). Have a read of the XFree86 Video Timings HOWTO and a quick google also gives a swag of hits.
 
  


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