I am currently running a duel core, intel based Machine with an Nvida 9800 GT graphics card. I have been meddling around with the ranges in the Devices- Monitors in x-config and been unable to get the full screen to display on my 42" TV/Monitor. It worked fine when I was using CentOS 5 ( I know- very old version!) and a VGA connection but since I change OS to Fedora 11 and have connected via HDMI instead of VGA half the screen cuts off - about 1/4 at the top and 1/4 at the bottom. (I also haven't even been able to get to terminal.) I've read some posts that are similar dealing with fedora 7 and fedora 11, but, being a n00b, have been unsuccessful in my attempts to rectify the matter for 11. Has anyone else figured out a solution for this? and If so, what did you do?

Hi,
to me this looks more like a hardware problem.
But since you are thinking of software-matters lets try this first:
1. is your sent resolution equal to the native resolution of the display? I assume it is, but never miss to ask..
2. if not, is there a proper EDID-communication between display and graphics card? This is pretty tricky to check and you will have to search damn lot of information to verify this, so it might be pretty optional to check this.

But as mentioned I think this problem is more caused by the display or the other way round by the HDMI-connection.
It is pretty common through current display-generations that they assume signals on the HDMI-input automatically to be video-signals. And in video-technology a feature called "overscan" is exactly what you described by the 5% "crop", which is a historical relict from times of CRTs and analog signals. Maybe your display has a option to enable this. Probably you would find it in the advanced menu, or in the "sizing" or "input" section of the OSM of the display. If your display offers no option maybe your graphics card's driver does. I think the CCC of ATI has one slider to scale the output signal.
Otherwise you might want to try to adopt your HDMI to a DVI, which will be recognized as a data-signal by the display and the picture is shown pixel by pixel.
The background to this is, that DVI has evolved to be mor a data-standard and HDMI is a consumer-standard and mostly used by video-devices like camcorders or DVD-/BlueRay-players. The small-sized equivalent to DVI will be the Displayport in mol near future.

So far we've managed to get the display to the proper proportions by switching to a virtual terminal and then back to the actual x display. We added a VGA frame buffer console to the boot parameters. The other solution is to log in and zap! the display a few times. It isn't even consistent with root, which makes us think it's not a permissions issue. We've configured and reconfigured xorg.conf, and checked the videocard drivers, and nothing seems to be amiss. It's as though the auto-detect only works 25% of the time. We've attempted turning off the auto-detect, which results the dislay switching into 1080i mode. (Which results in lots of fuzzy - and not the feel good warm kind )

I would attempt the DVI, except my tele doesn't have that sort of connector. Unfortunately all I have to work with is HDMI and VGA... And given the dramatic clarity differences, and that the primary use is for graphics, VGA is not the optimal choice.

Thank you for your assitance! Please let me know if you have any other ideas!