G35: crosstalk from integrated GPU to sound chip

Ross Vandegrift ross at kallisti.us
Sun Jun 8 10:57:53 PDT 2008

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

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