Re: High pitched noise from laptop: processor.c in linux 2.6

[Måns Rullgård]

Lee Revell <rlrevell@xxxxxxxxxxx> writes:

> On Wed, 2004-10-20 at 12:37, Måns Rullgård wrote:
>> I've noticed my laptop makes a slight noise whenever there's heavy
>> network traffic.  Maybe that could be used to control the pitch even
>> without a kernel hack.
>
> Well, in your case the bad capacitors might be in the NIC.  The ethernet
> phones at my last job were so cheaply made that you could hear it ARPing
> through your computer speakers.

I have and old Alphastation where the onboard sound card picks up all
sorts of noise.  If you connect some speakers everything gets it's own
special noise, from cache misses to SCSI traffic.

> I bet you could actually identify the singing capacitor using a
> telephone toner wand.  IMHO this is a bad enough problem to RMA it. 

Not really, it's barely noticeable in a quiet room.

-- 
Måns Rullgård
mru@xxxxxxxxxx
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