A8Js and Intel Speedstep CPU Support - Changes after BIOS 204?

I've been trying to track down the root cause of a particularly bothersome problem with my A8Js, as it relates to the Speedstep feature of the Intel CPU, and the laptop's support of it. Running under Linux, I could not enable CPU Frequency Scaling (the Linux support for Intel's Speedstep feature), until I changed to BIOS version 204. In fact in my testing of all BIOS releases for this laptop these were my results;

BIOS version 203 - CPU Speedstep under Linux works
BIOS version 204 - CPU Speedstep under Linux works
BIOS version 205 - CPU Speedstep under Linux doesn't work
BIOS version 207 - CPU Speedstep under Linux doesn't work
BIOS version 210 - CPU Speedstep under Linux doesn't work

So it seems clear to me that Asus has changed something, probably as it relates to Speedstep support, in their BIOS from 205 onwards, which breaks Speedstep under Linux. The problem is that it seems to operate somewhat under Windows XP. My testing results were inconsistent under XP, so in reporting this back to Asus, I can't be specific about an XP Speedstep problem that may be BIOS related. My question for anyone who would like to respond, have you noticed anything different about your A8Js-Windows XP CPU Speedstep operation between BIOS 204 and later revs? Feel free to provide as many details as you can, such as problem seen, power management software used, etc.

Thanks.

Thanks but I don't need help getting Speedstep working under Linux. I've got it working. I was just curious if anyone using Windows XP saw anything strange in regards to Speedstep operation between BIOS 204 and 205/207.

If anyone is following this thread and is curious about A8Js Linux Speedstep support, there is a user over on the NBR forums who claims that the 2.6.20-r2 Linux kernel fully supports Speedstep with the latest BIOS. He's running an Ubuntu Feisty Fawn beta on his A8Js. If that's true then the speedstep-centrino module authors either patched around the BIOS, or fixed a bug in the module. Either way this is probably moot now and it makes Linux support of the A8Js very good. (I've got everything except the webcam operating well under Linux..)