[LAU] recommendations for usb sound card?

[James Stone]

On Mon, Mar 10, 2008 at 12:56:17PM -0500, Lee Revell wrote:
> On Sun, Mar 9, 2008 at 3:15 AM, James Stone <jamesmstone at gmail.com> wrote:
> > On Sat, Mar 08, 2008 at 07:03:30PM -0500, Lee Revell wrote:
> >  > On Sat, Mar 8, 2008 at 2:58 AM, James Stone <jamesmstone at gmail.com> wrote:
> >  > > Hi,
> >  > >
> >  > >  I am wanting to use the eeepc for a mobile sound generation unit,
> >  > >  but unfortunately the gfx card and sound card share the same
> >  > >  interrupt.
> >  >
> >  > This is not necessarily a showstopper.  At least in theory.  Do you
> >  > have any empirical evidence that it's a problem for you?
> >
> >  xruns..
> >
> 
> OK.  And you're sure the IRQ priorities were set correctly, realtime
> kernel used, JACK in realtime mode, etc?
> 

Yes. but IRQ tuning is not much use with the video on the same
interrupt as the sound card. Basically whenever a widget moves,
sound dropout occurs.

> >
> >  >
> >  > I would think that if you can disable the VSYNC interrupt from the gfx
> >  > card, that it would be even less of a problem.  In my experience,
> >  > VSYNC interrupts on Linux don't help anyway - I've compared the
> >  > results with and without it enabled on both ATI and NVIDIA cards and
> >  > the display tears horribly (esp. when playing movies or moving windows
> >  > quickly) either way.
> >
> >  Sounds good. How do I disable that?
> >
> 
> In the control panel for your video card.  nvidia-settings for nvidia,
> amdcccle for ATI, no idea for Intel.
> 

I am not sure it is possible, but I will do some more digging.

James