Put a Modeline into the Monitor section of /etc/X11/XF86Config(-4) (or
whatever and wherever your X configuration resides).  

A Q&D method I've used to get Modelines is to do a strings on
Xconfigurator and search for the Modeline I want:

strings /usr/bin/X11/Xconfigurator | less

Do a search on Modeline and voila! Modeline heaven.  You even get the 
comments for the resolution, etc.

Another useful utility is xvidtune for small tweaks.

rna

On Fri, 2 May 2003, der.hans wrote:

> moin, moin,
> 
> it's been a while since I've even thought about X config and I haven't
> figured this one out.
> 
> Someone I know has a monitor that he swears is at something like 60 Hz. I
> actually trust him to be correct.
> 
> He's mucked his X config to try to take away the bottom range, but hasn't
> been able to get a higher refresh rate.
> 
> Anyone know how to peg a refresh rate or enforce a minimal refresh rate?
> 
> This is on XFree86 4.2. Red Hat.
> 
> ciao,
> 
> der.hans
>