Re: High-pitch noise with 2.6.0-test11

From: Andrew McGregor
Date: Sat Dec 06 2003 - 06:48:17 EST

Nearly all Dell laptops do this, it's the power supply making that noise. The supply won't fail, but it's bad for the batteries. The solution in 2.4 was to turn off 'APM calls when CPU idle'. I suspect unloading thermal.o has the same effect.

As for X, do you have the Synaptics touchpad X driver in Fedora core? You probably need the kernel driver as well, and to check out the documentation (sorry, no pointer handy). It's a bit different, in that the driver suppresses taps and clicks that are too close in time (by a configurable amount) to typing. This avoids the common false mouse clicks caused by case flexure setting off the touchpad. It also implements X events for corner taps, edge scroll regions, and pressure sense. All in all, much better once understood, but it is different.


--On Friday, 5 December 2003 1:31 a.m. -0500 Jean-Marc Valin <Jean-Marc.Valin@xxxxxxxxxxxxxx> wrote:


I just installed 2.6.0-test11 on my Dell Latitude D600 (Pentium-M)
laptop and I noticed a strange high-pitch noise comming from the laptop
itself (that wasn't there with 2.4). The noise happens only when the CPU
is idle. Also, I have noticed that removing thermal.o makes the noise
stop, which is very odd. Is there anything that can be done about that?

Another (unrelated) problem I noticed is the fact that since I upgraded
to 2.6, X started behaving strangely wrt left-click copy and
middle-click paste. Any idea what the cause can be? I'm using Fedora
Core 1.



P.S. Please CC to me, since I'm not subscribed

Jean-Marc Valin, M.Sc.A., ing. jr.
Université de Sherbrooke, Québec, Canada

Andrew McGregor
Director, Scientific Advisor
IndraNet Technologies Ltd
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