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When I try to run games, I get an error: Input signal out of range. I am running an nVidia 7800GS AGP card and this happens with both my F8 and Sidux 64-bit installs. No issues with my Debian 32-bit install. What could be the issue?
Games often want to run at 640x480 resolution.
When the game switches your card to this resolution, the Hsync & Vsync are being set incorrectly for your monitor, so it will not display the image, and displays "Input signal out of range".
You need to fix up your xorg.conf
In your debian xorg.conf, section Section "Monitor", you have not specified your HorizSync or VertRefresh, so it is probably asking the monitor what these values should be, and filling them in for you.
I suggest you either provide the correct sync details in the non-working distros, or you do not specify them at all. Search for monitor edid for further insight.
I've been looking at KDE Control Center (Debian 64-bit) and I've noticed that the problems start to occur when I want to go below 1024x768. What I've noticed is that default refresh rate it choose is the lowest it can find (typically in the high 50s). On this install the monitor section of my xorg.conf looks like this
So is there a way to force ALL resolutions to use a minimum refresh rate of 60Hz for instance. What is also interesting is that even if I use nvidia-settings to save the default refresh rate at 1280x1024 to 60Hz, when I run KDE Control Center it reports 50Hz.