Hello all! I wanted to share a bit of my experiment with you : I am running a Dell Inspiorn 510m laptop under a Debian Sarge (kernel 2.6.8). I noticed that when I use the ACPI "processor" module, there is a continuous thin high-pitched noise coming from the laptop, apparently from the area under the top-left corner of the keyboard. As soon as I unload the above module ("thermal" depends on it, so I have to unload this first), the noise is gone. This is quite strange, and I went through this because this noise is extremely boring and stressful, particularly when you are using your laptop in a quiet environment (and one of the reasons for which I have a laptop is that I love the silence). Any reaction would be appreciated. If anyone out there knows the reason for that noise...
Yours, JB.