Controlling the fancy LEDs on DELL XPS Gen2

[Stefan Kanarski]

Dear Michael and libsmbios developers,

I'm not quite sure if this is the right place to ask, but I have a strong 
feeling it is.

I'm using Debian GNU/Linux on my DELL XPS Gen2 notebook and I would like to 
write an application to control the fancy LEDs from Linux with a nice GUI. 
Something like the Dell QuickSet tool for Windows.
Which functions do I have to use with which values to set colors and 
brightness of the LEDs?

Is there a documentation for this and maybe other BIOS functions available?
I already saw some mails on this list on how to control the display brightness 
with the smitest tool which works like a charm.
But how to know that one have to look for 0x7D in the output of dumpCmos?
It could also be interesting, how to separately switch WLAN and Bluetooth on 
and off (the Fn+F2 hotkey always switches both)?

By the way: I saw a plugin for some Windows media player which flashes the 
LEDs in the beat of the music. Is it save to change the LEDs at such a high 
rate or does it wear out the CMOS memory?

With best regards

Stefan