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From: Robert Eckardt <roberte@mep.ruhr-uni-bochum.de>
Message-Id: <199707071449.QAA21838@beta.mep.ruhr-uni-bochum.de>
Subject: Re: noninterlaced 75MHz refresh at 1024x768
In-Reply-To: <199707070752.AAA17986@psln1.psln.com> from "Daniel \"the Bruce\" Keller" at "6. Jul. 97 13:23:27"
To: dkeller@psln.com (Daniel \"the Bruce\" Keller)
Date: Mon, 7 Jul 1997 16:49:52 +0200 (MET DST)
Cc: freebsd-questions@FreeBSD.ORG
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> Hi,
> I am trying to configure my X system for noninterlaced 75MHz refresh at
                                                           ^ :-)

> 1024x768? I was told before that to change the refresh I need to change the
> clock frequency. I am currently configured for 1024x758 interlaced, I do
> not know the current refresh. I know my video card and moniter can handle
> it in noninterlaced mode, that is how in runs in win95. Currently my
> XF86Config files lookes like this:
> 
> HorizSync      31.5, 35.15, 35.5
> VertRefresh    55-90
> Modeline       "1024x768"     44.90  1024  1088  1248  1264  768  772  780 
> 829  interlace
> 
> I have tried just removing the word interlace, but then I get the following
> messages:
> 
> (--)  S3: Maximum allowed dot clock: 220.00 MHz

This is more than perfect, but you won't get 75 Hz ni with that monitor.
With 35.5 kHz you will get at most 46 Hz ni.

You'll need a monitor with an upper limit for HorizSync of 60 kHz.
What kind of monitor do you use.
What do its specifications say ?

> (--)  S3: There is no mode definition named "1024x768"
> (--)  S3: Removing mode "1024x768" from list of valid modes
> 
> I think I need to change the clock frequency as well as removing the word
> "interlace" from XF86Config, my video card is a STB Velocity 3D with 8mb of
> RAM.

You'll need s.th. around 80 MHz.

> 
> Thanks!
> Daniel Keller
> 
> PS:
> Thanks to Robert Eckardt and everybody else who helped me last time I was
> triyng to figure this out.
> 
> 


-- 
Dr. Robert Eckardt                                                 (
    Ruhr-Universitaet Bochum, Inst.f.Theor.Physik, NB6/169          )
    Universitaetsstrasse 150,   D-44780 Bochum,    Germany     ----X---8----
    Telefon: +49 234 700-3709,   Telefax: +49 234 7094-574             8
    E-Mail:  RobertE@MEP.Ruhr-Uni-Bochum.de                    --------8----
    URL:  http://WWW.MEP.Ruhr-Uni-Bochum.de/~roberte
>>> A magician never reveals his secret:  the unbelievable trick becomes <<<
>>>                             simple and obvious once it is explained. <<<