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