Re: sndio:disconnected problems on FreeBSD 12.1

From: Alexandre Ratchov <>
Date: Tue, 4 Aug 2020 09:11:16 +0200
On Mon, Aug 03, 2020 at 05:24:07PM +0000, MrPhyber wrote:
> > It's supposed to work without teaks. What you describe tends to
> > happens when play and recording rates are not strictly the same. Could
> > you confirm that both directions are using the same device?
> >
> > Do you know if this is a new problem?
> I've checked the play/rec rates and both seem to be equal
> (48000Hz). Both directions are using the same physical
> sound card (on my freebsd install the usb sound card uses
> pcm6:play:dsp6 and pcm6:record:dsp6). With only the play
> mode I had to adjust the block size or otherwise I would
> continuosly get:
> snd0: play hw xrun, pused = 3840/4096
> (similar with play/rec).
> The strange thing that I forgot to mention in the previous
> mail is (and btw sorry for the double mail, that was an
> accident): reading from the manpage, the default buffer size of the audio dev is 7680 and the block size is 960.
> If I don't set these values I get the xruns, but if I manually
> set them to the default values (-b 7680 -z 960) all is fine.
> I don't know if I am not understanding something or if this
> is a known problem, sadly.

Neither your misunderstanding, nor a known problem. Probably a subtle
difference between FreeBSD and other OSes audio sub-system behavior,
revealing a bug in libsndio.

Thanks for reporting it, I'll try to reproduce it and fix it.
Received on Tue Aug 04 2020 - 09:11:16 CEST

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