Maybe this XF86Config code will help you out:
Code:
Section "InputDevice"
Identifier "LogitechDC_Keyboard"
Driver "kbd" # Keyboard driver of Xorg
Option "AutoRepeat" "500 30"
Option "XkbModel" "logicdp" # logitech cordless desktop pro ("desktop comfort")
Option "XkbOptions" "compose:rwin" # use rwin for compose (for special keys!!)
Option "XkbLayout" "us" # us, en_US, nl(euro)
# disabled because I use the compose key for this:
# Option "XkbVariant" "intl" # international keys (typing 'e displays é)
EndSection
The XkbModel is the thing you want.
I once edited my XF86Config to get the keys working. You can also try using the KDE keyboard configuration module, which does basically the same at KDE startup. The XF86Config-version works system-wide off course.