[alsa-devel] Assert in pcm_params.c

Raymond Yau superquad.vortex2 at gmail.com
Tue Feb 18 08:56:48 CET 2014

2014-02-18 4:56 GMT+08:00 Alan Horstmann <gineera at aspect135.co.uk>:

> Hi,
> I am trying to assist in a case that is getting this assert:-
> pcm_params.c:2249: snd1_pcm_hw_params_slave: Assertion `err >= 0' failed.
> and wondered if anyone could shed some light on what is likely to cause
> that,
> and whether it indicates an underlying fault?

you need to know which plugin  is used ?

this occur when error return by snd_pcm_xxxxxx_hw_refine_schange in the

e.g. route plugin in


> The system (not mine) runs Linux Mint 13 (kernel 3.2.0) with PulseAudio,
> and
> we are debugging weird behaviour during Portaudio initialisation.  It is
> struggling to get consistent access to the Alsa devices, often retrying
> many
> times.

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