Date: Mon, 23 Dec 2002 01:09:52 +0000 From: John Murphy <jfm@blueyonder.co.uk> To: newbies@freebsd.org Subject: Re: Vrefresh clocking Message-ID: <tbnc0vst4l0ealog27ef5cfellmtipeqjj@4ax.com> In-Reply-To: <F3MvIggcpPxgweE4YLE000094d3@hotmail.com> References: <F3MvIggcpPxgweE4YLE000094d3@hotmail.com>
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"clayton rollins" <crollins666@hotmail.com> wrote: >After plugging in a good multi-sync monitor and adjusting my XF86Config, I >re-ran startx, and checked the logs again. To my surprise, three good modes >were found with 75-76kHz vrefresh. (using the s3 trio driver) It's the little 'k' in there I was worried about. Vertical refresh rate is Hz (ie. fps whole pictures/second) not kHz. >I decided this was an acceptable thing after finding many different >companies recommending their users set the vrefresh as low as >73-point-something for this monitor. I also believe that win 98 uses greater >ranges than this due to the amount of distortion/flickering I would get in >some of their modes (maybe just subjective opinion, though). win2k insists my Compaq V70 only does 1024x768 @ 60Hz but it's been working nicely at 85Hz. I doubt if you'd notice any flicker at 76Hz unless your ambient lighting was refreshing at an unfortunate harmonic :) >I'm also going to continue to tinker with a custom modeline to try to get >the vrefresh exactly right. (If anyone knows a link or man page which breaks >down the math behind this, feel free to shout it out.) You shouldn't need to but Greg Lehey's explanation in The Complete FreeBSD is worth reading if you have access to it. Googling 'Xfree86 modelines' leads to (hopefully) useful resources. -- John To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-newbies" in the body of the messagehelp
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