Re: [LAU] recommendations for usb sound card?

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@email-addr-hidden> 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@email-addr-hidden> 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
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Received on Tue Mar 11 00:15:10 2008