G35: crosstalk from integrated GPU to sound chip

[Ross Vandegrift]

On Sun, Jun 08, 2008 at 02:25:32PM +0200, Rainer Dorsch wrote:
> It continously picks some noise. When one or several blocks of the screen 
> change, I can hear a "clack" sound. Also when I run glxgears the noise level 
> increases significantly.
> 
> The noise does not change when I plug off the DVI/HDMI cable at the computer 
> or when I use a headset instead of the speakers. Thus I think the crosstalk 
> happens inside the system. The glxgears setup indicates that it has something 
> todo with the integrated GPU.
> 
> Anybody seen something like this before?
> 
> Any suggestions are welcome.

If you don't use the line-in or analog CD-Audio inputs, mute them.
I've had various soundcards over the years that picked up noise from
things like graphics and mouse movements on these sources.

-- 
Ross Vandegrift
ross at kallisti.us

"The good Christian should beware of mathematicians, and all those who
make empty prophecies. The danger already exists that the mathematicians
have made a covenant with the devil to darken the spirit and to confine
man in the bonds of Hell."
	--St. Augustine, De Genesi ad Litteram, Book II, xviii, 37