[alsa-devel] [PATCH] Fix buffer position for ATI SB4x0
tiwai at suse.de
Fri Jun 6 18:49:28 CEST 2008
At Fri, 6 Jun 2008 11:52:32 -0300,
Mauro Carvalho Chehab wrote:
> On Thu, 29 May 2008 16:20:21 +0200
> Takashi Iwai <tiwai at suse.de> wrote:
> > At Thu, 29 May 2008 11:10:22 -0300,
> > Mauro Carvalho Chehab wrote:
> > >
> > > ATI SB4x0 doesn't need any fix at position.
> > It's not about the position fixing but whether to use the
> > position-buffer. The devices on the blacklist are the ones that have
> > no position buffer. So, it would fall into LPIB mode, and this list
> > avoids it from the beginning.
> > > This patch solves the issue of receiving several clicks during capture on those
> > > devices.
> > >
> > > Tested with a Gateway Notebook MX-6453.
> > The click noise is often a different problem. Did you already try
> > the patch below?
> The click seems associated to some residual samples inside the buffer. Here it
> is a sample of the king of click noise I'm hearing here (captured from CD input entry):
(I didn't check the ogg file yet, and just a wild guess)
Is it with dsnoop plugin? With "default" PCM, ALSA uses dsnoop for
capture to allow multiplexing for HD-audio. Does it happen with "hw"
or "plughw" PCM?
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