[LAU] UA25 noise problem w. nVidia chipset

[S. Massy]

On Wed, Apr 06, 2011 at 06:34:03PM -0400, Dave Phillips wrote:
> Greetings,
> 
> I've been working with Ardour3 on my laptop, a machine with an AMD
> Turion X2 CPU and an nVidia 8200M integrated video chipset. Recently
> I started monitoring my test recordings through the headphone output
> of my UA25 and I notice that when I move the mouse it creates
> scratchy sounds, though QJackCtl reports no xruns and my recordings
> are unaffected. I verified the problem with Ardour2 and Mixbus. It
> doesn't occur when I use the integrate audio chipset (snd-hda-intel,
> wahoo).
> 
> Running 'cat /proc/interrupts' reports that usb1/usb3 share
> interrupt 17 and usb2/usb4 share interrupt 16. I've tried switching
> ports around but that didn't get rid of the noise. Any further
> suggestions ?
Do you see any difference if you toggle the ground lift switch at the
back?

Cheers,
S.M.

> 
> Best,
> 
> dp
> 
> 
> 
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