http://forum.xbmc.org/showthread.php?p=516904
I didn't need many of the steps mentioned there, since I already had XBMC 9.11 Live running on Linux. So far, I was using my own ModeLines I set up manually. But it turned out the EDID-modes actually do work fine out of the box with the following settings:
/etc/X11/xorg.conf
Section "Device" Identifier "nvidia" Driver "nvidia" Option "NoLogo" "true" Option "DynamicTwinView" "false" Option "NoFlip" "false" Option "FlatPanelProperties" "Scaling = Native" Option "ModeValidation" "NoVesaModes, NoXServerModes" Option "UseDisplayDevice" "DFP-1" Option "ModeDebug" "true" Option "HWCursor" "false" EndSection Section "Screen" Identifier "screen" Device "nvidia" SubSection "Display" Modes "1920x1080_24" "1920x1080_50" "1920x1080_60" EndSubSection EndSection Section "Extensions" Option "Composite" "false" EndSection
That was all that was neccessary. Well, in order to find out what "Modes" the driver has available, you have to have the "ModeDebug" setting enabled and then check the listing of modes within your /var/log/Xorg.0.log:
sed -n '/- Modes/,/- End/p' /var/log/Xorg.0.log | sed 's/.*(0)://g' > ~/modes.txt
Then simply pick the wanted resolutions. Afterwards, restart the X-Server for the changes to take effect. In case of the XBMC Live, that means:
service xbmc-live stop service xbmc-live start