[alsa-devel] 2.6.30-rc8 skipping regression also affects cmipci

[Raymond Yau]

2010/3/2 Frédéric Brière <fbriere at fbriere.net>

> Frédéric Brière <fbriere at fbriere.net> wrote:
> > In so doing, I noticed infrequent occurrences of audio skipping, which I
> > managed to bisect down to c87d973.  It would appear that this commit
> > also affects cmipci (CMI8738), albeit not as badly as it did for
>
> Apparently, this is also causing crashes for PulseAudio users:
> <https://bugzilla.redhat.com/show_bug.cgi?id=524385>.  (My thanks to
> Masanari Iida for this pointer.)
>
> Again, if there's anything I can do to help, please let me know.  And
> thanks for your hard work!
>
>
> -


Why  PA sometime use snd_pcm_avail() and sometime use snd_pcm_delay() ?

pulseaudio[2114]: alsa-util.c: snd_pcm_avail() returned a value that is
exceptionally large: 18446744073709549460 bytes (418293516398 ms).
pulseaudio[2114]: alsa-util.c: Most likely this is a bug in the ALSA driver
'snd_cmipci'. Please report this issue to the ALSA developers.
pulseaudio[2114]: alsa-util.c: snd_pcm_dump():
pulseaudio[2114]: alsa-util.c: Hardware PCM card 0 'C-Media CMI8738' device 0
subdevice 0
pulseaudio[2114]: alsa-util.c: Its setup is:
pulseaudio[2114]: alsa-util.c:   stream       : PLAYBACK
pulseaudio[2114]: alsa-util.c:   access       : MMAP_INTERLEAVED
pulseaudio[2114]: alsa-util.c:   format       : S16_LE
pulseaudio[2114]: alsa-util.c:   subformat    : STD
pulseaudio[2114]: alsa-util.c:   channels     : 2
pulseaudio[2114]: alsa-util.c:   rate         : 44100
pulseaudio[2114]: alsa-util.c:   exact rate   : 44100 (44100/1)
pulseaudio[2114]: alsa-util.c:   msbits       : 16
pulseaudio[2114]: alsa-util.c:   buffer_size  : 16384
pulseaudio[2114]: alsa-util.c:   period_size  : 8192
pulseaudio[2114]: alsa-util.c:   period_time  : 185759
pulseaudio[2114]: alsa-util.c:   tstamp_mode  : ENABLE
pulseaudio[2114]: alsa-util.c:   period_step  : 1
pulseaudio[2114]: alsa-util.c:   avail_min    : 15886
pulseaudio[2114]: alsa-util.c:   period_event : 0
pulseaudio[2114]: alsa-util.c:   start_threshold  : -1
pulseaudio[2114]: alsa-util.c:   stop_threshold   : 4611686018427387904
pulseaudio[2114]: alsa-util.c:   silence_threshold: 0
pulseaudio[2114]: alsa-util.c:   silence_size : 0
pulseaudio[2114]: alsa-util.c:   boundary     : 4611686018427387904
pulseaudio[2114]: alsa-util.c:   appl_ptr     : 4227619
pulseaudio[2114]: alsa-util.c:   hw_ptr       : 4210696
pulseaudio[2114]: alsa-util.c: snd_pcm_delay() returned a value that is
exceptionally large: 329472 bytes (1867 ms).