linuxaudio.org

Hi,
My definite solution for such a noise on my old ASUS L2000D was simply

to not provide the computer with its earth connection when plugged. I

first used a tiny piece of plastic bag to isolate the earth connection

from the pin of the wall plug to the mains cable but eventually I built

a custom mains cable (connection from wall plug to switching power

supply box) with earth pin not connected.
I do not have anymore noise in audio output (I used to have in both

internal chipset and USB interface...)
Hope it works for you and you're not too concerned about strict

electrical security (-:
++
Jé
Eric Dantan Rzewnicki a écrit :

quoted text
> On Sat, Mar 10, 2007 at 10:56:41PM +0300, Dmitry Baikov wrote:

>> On 3/10/07, Eric Dantan Rzewnicki  wrote:

>>> Is there anything I can try to do to get rid of the noise when plugged

>>> into power?

>> Possibly it's a ground loop.

>> Sometimes, reversing power plug (i.e. swapping zero and phase pins) of

>> the offending device (in your case either one monitor or the laptop)

>> helps.

>

> Hmm ... I'm not all that knowledgeable about electricity, but I thought

> ground loops happened when you had two different paths to ground. i.e.

> ... devices connected to 2 different circuits. But, again, I don't

> really know what I'm saying here.

>

> -Eric Rz.

>

>