Hi JB, I can confirm this one with my HP nx7010 (Centrino processor).
it seems to be something to do with the processor going into sleep modes to save power. There has been significant discussion on kerneltrap,org about this recently related to the proposals to change the HZ value in the kernel. The suggestion has been made that it has to do with poor quality components (capacitors were blamed, IIRC) in the power supplies that tend to buzz as the power consumption goes up and down. One thing that I have found is that if I increase the load on the processor or plug in some USB devices (which presumably does the same thing) then it goes away... So if you're feeling like some further experimenting.... does it buzz under 2.4 kernels? (HZ=100 in 2.4 series). If you feel like recompiling your kernel, try changing the value for HZ in the headers back to 100 and see what that does for you. I'd quite like to nail this one down too, but I think we need a number of people with different machines (and lots of time for recompiling kernels...) to be able to come up with some definitive empirical understanding of what's going on. (and it seems that kernel hackers don't use laptops so they've never noticed this) cheers Stuart -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
