[alsa-devel] [PATCH]Support MCP89 and GT21x hdmi audio

[VDR User]

On Wed, Mar 10, 2010 at 11:30 PM, Jaroslav Kysela <perex at perex.cz> wrote:
> On Wed, 10 Mar 2010, VDR User wrote:
>
>> [pid 22651] ioctl(21, 0x80044121, 0xb439d2cc) = -1 EPIPE (Broken pipe)
>> pcm_hw.c: snd_pcm_hw_delay() SNDRV_PCM_IOCTL_DELAY failed.
>
> -EPIPE means underrun condition.
>
> Try 'echo 101 > /proc/asound/card0/pcm0p/xrun_debug' and send dmesg output
> to check if the ring buffer pointer in the hda-intel driver does not return
> wrong values. Replace card0 and pcm0p with right identifiers (look to 'aplay
> -l' for right numbers).
>
> More info: http://www.alsa-project.org/main/index.php/XRUN_Debug

Hi, thanks for your further reply.  However, I don't see
"CONFIG_SND_PCM_XRUN_DEBUG" anywhere in the kernel config (both in
menuconfig or .config).  Also, in order to use the snapshot I had to
disable ALSA in my kernel anyways.  I did try to enable it just to see
if that option would appear somewhere but it did not.  I am using
stable kernel 2.6.33 btw.  I don't see how I can create
/proc/asound/card1/pcm3p/xrun_debug!

Best regards,
Derek