You need an advanced manual on your Thinkpad, not on XP !
There is no "default" Registry location for this function defined in XP as far as
I know.
Different manufacturers and different models use different keys and coding where
this function is provided - the Registry is just a place to store these things and
MS have not defined a standard location for it.
The fact that you can control via Ubuntu just demonstrates Linux's superior integration
with hardware compared with any version of Windows.
You can beat up Mr Rice as much as you like, but that will not create the subkey
in XP's standard registry that you are looking for, and I'll bet that IBM won't publish
the details of what they did either (if indeed they did it !) - however you may find
someone on a hardware forum who has experimented and found what you are looking for.
