Redhat 8.0... change the refresh rate?


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Hey all,

I'll admit... I am new to Linux.. I grew up using Windows. Having used Windows 3.11 when I was 7 you must understand that I am used to the right click -> Properties -> Settings Tab -> advanced to change the refresh rate.

Linux, especially Red Hat 8.0, is a major pain to change the refresh rate. Under Windows my monitor gets detected as a Plug 'n Play monitor.. under Redhat it gets detected as a non-probed monitor or something like that.

My default resolution on a Sylvania F97 (costco monitor) in Windows is a nice crisp 1280x1024@85Hz... under Linux it won't even do 1280x1024 (Geforce 4 vid card I might mention) it does 1024x768@60Hz... painful to my eyes.

Yes I tried to run XF86config in text mode outside of X and I tried to run setup in text mode. It is all a no go.

I also put in the specs of what my monitor can do in the setup found on the sylvania website hoping that the setup program would possibly go to a higher refresh rate/resolution.

I might add that my sound card (Sound Blaster Audigy) gets auto detected but the only thing auxmixer detects is my volume for my MIC... and there isn't even one installed.. so I am also having issues with that. I could possibly solve that issue if I were to have a resolution where my eyes wouldn't melt :disappoin

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  • 4 weeks later...

I'm also stuck at 60Hz in Redhat 8. I have a feeling it's related to my Gf4Ti and the lack of current drivers... but yeah, I am in the same boat as you. Please let me know if you find anything.

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Open up XF86Config-4 and find somthing similar to this:

Section "Monitor"
        Identifier      "Generic Monitor"
        HorizSync       28-75
        VertRefresh     43-75
        Option          "DPMS"
EndSection

Then I assume you change the max to whatever you monitor can handle (I use 75 @ 1152x768), post your XF86Config and XF86Config-4 so that we know some more details about your setup.

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ok, this is from my XF86Config:

Section "Monitor"
	Identifier   "Monitor0"
	VendorName   "Monitor Vendor"
	ModelName    "Sony CPD-G200"
	HorizSync    30.0 - 96.0
	VertRefresh  48.0 - 120.0
	Option     "dpms"
EndSection

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XFree86's known bug, if you have the 24/32 bit colours, then the refresh rate won't work very well. You will have to tune the colours bit down to 16 bit, then you will be able to push more refresh rate.

Opio, you just change from....

VertRefresh 48.0 - 120.0

to....

VertRefresh 70.0 - 120.0

If you want more than 70, then tune it up until max. Mine only can go as far is 75Hz, if I touch 80Hz then it will either bring to 800x600 or just crash the X.

I think, in XFree86 4.3 should be fix this issue or it's already in the CVS version. I am not sure..

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