X-Display issues [SOLVED]

[Daniel B. Thurman]

Daniel B. Thurman wrote:
>
> I have been struggling over the X-Display system. I have
> an Nvidia chipset, not that it may matter.
>
> When I originally installed F10, I was able to get the X-display
> (but there was no xorg.conf file) and the screen appeared to look
> high resolution, but the screen size appeared to look like a 1600x1200
> but was only covering only 2/3 of the screen monitor.  Along with that,
> there were white horizontal flickering lines appearing randomly in a
> vertical column, just to the right of center.  I suspected that the 
> problem
> is the vertical refresh rate, set too high for my monitor.  But 
> setting this
> value is not possible, afaik, with the system-config-display tool.
>
> I found somewhere that there is also an x display helper tool that
> allows one to set the vertical refresh on the fly (against I forget what
> it was), and set the value to 75Hz and it worked.  My display screen
> covered 100% of my monitor screen so I know that I need a tool to
> set the vertical refresh rate permanently.
>
> I also know that there is an alternate gui tool available that allows me
> to permanently set the vertical refresh rate, but I cannot recall what 
> it is.
>
> Can someone remind me what it is?
>
> Thanks!
> Dan
>
Never mind.  I figured it out.  I needed to create the xorg.conf file
and limit the vertical refresh rate therein.  I believe that at installation
time, the setup tool somehow could not determine the monitor I was
using (it was initially `unknown') and xrandr tried to calculate the
vrr a bit too high for the monitor (Hitachi CM813).  So I limited the
range from 50.0 to 85.0 and everything is working well.

Dan