Re: aplay: pcm_write:1025: write error & SNDRV_PCM_IOCTL_PREPAREfailed:device or resource busy

[Takashi Iwai <tiwai@suse.de>]

At 18 May 2003 17:05:32 -0700,
Mark Knecht wrote:
> 
> Hi,
>    I brought up Alsa Friday on a Gentoo platform and used it for most of
> Friday evening and Saturday in one form or another. Along the way I was
> building some new kernels to fix some SCSI issues and a few other items,
> which required that Alsa get rebuilt also as per the Gentoo Alsa
> instructions. This process went on for most of the day. Later Saturday
> evening, following who knows how many 'unrelated' changes, Alsa stopped
> working. The error messages look like this:
> 
> Wizard root # aplay wave/sequen~1.wav 
> Playing WAVE 'wave/sequen~1.wav' : Signed 16 bit Little Endian, Rate
> 44100 Hz, Mono
> aplay: pcm_write:1025: write error: Input/output error
> Wizard root # 
> 
> or when trying to play a game like frozen-bubble, that app locks up hard
> and in my console I see:
> 
> ALSA Lib pcm_hw.c:467:(snd_pcm_hw_prepare)SNDRV_PCM_IOCTL_PREPARE
> failed:device or resource busy
> 
> alsaplayer starts to run, sees the CD (I.e. - shows track length) and
> then won't play the CD.
> 
> I'll attach a bit of data, but can anyone point me toward what might be
> causing this? 

the chip looks like a VIA8235, so the (first) pcm device supports
multiple playbacks but with the same sample rate.
please check whether there is any other app running and using the pcm
device and if it uses different sample rates (e.g. 48kHz)...


Takashi


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