[alsa-devel] commit bd5389278c96f585afcac4058420e4f3ac201d2a introduce big problem

[Takashi Iwai]

At Mon, 14 Nov 2011 17:53:10 +0800,
Scott Jiang wrote:
> 
> >
> > When I use ad1836 and ad1938 with alsa lib 1.0.24, there is an error:
> >
> > root:/> arecord -t wav -c 2 -d 3 -r 48000 -f S32_LE 1.wav
> > Recording WAVE '1.wav' : Signed 32 bit Little Endian, Rate 48000 Hz, Stereo
> > arecord: pcm_read:1773: read error: Input/output error
> >
> > If format isn't S32_LE, snd_pcm_plugin_readi will be called and
> > everything works fine.
> >
> Hi Takashi,
> Any feedback for this bug?
> I appreciate your help.

Does your driver support mmap?
What shows aplay -v with the arguments above?

I know of a problem of mmap-emul plugin when it runs over a slave
that supports the mmap by itself.  But it should work when it runs
over a slave that doesn't support mmap.


Takashi