[alsa-devel] Rewrite of hw_ptr updaters makes things worse?

[Takashi Iwai]

At Wed, 1 Apr 2009 18:46:27 -0400,
Chuck Ebbert wrote:
> 
> After adding these patches from 2.6.30 to a 2.6.29 kernel, pulseaudio problems
> are worse:
> 
> ALSA: pcm - Reset invalid position even without debug option
> ALSA: pcm - Fix delta calculation at boundary overlap
> ALSA: pcm - Safer boundary checks
> ALSA: Rewrite hw_ptr updaters

Hrm, these patches are basically to avoid reporting bogus hw_ptr
values to the user-space.  So, the problem could be really the bad
DMA pointer reporting on your hardware.  What shows if you enable
the debug via
	# echo 1 > /proc/asound/card0/pcm0p/xrun_debug
??  Note that this file appears when built with
CONFIG_SND_PCM_XRUN_DEBUG.

Jaroslav made some patches to handle the bogus DMA-pointer values.
Could you check sound git tree below, either for-next or master
branch?

   git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git


thanks,

Takashi

> 
> 
> Mar 28 14:28:20 platon pulseaudio[3040]: alsa-sink.c: Increasing wakeup
> watermark to 60,00 ms
> Mar 28 14:31:35 platon pulseaudio[3040]: alsa-sink.c: Increasing wakeup
> watermark to 70,00 ms
> Mar 28 14:31:35 platon pulseaudio[3040]: alsa-sink.c: Increasing wakeup
> watermark to 80,00 ms
> Mar 28 14:31:35 platon pulseaudio[3040]: alsa-util.c: snd_pcm_avail() returned
> a value that is exceptionally large: 4294952932 bytes (24347805 ms).
> Mar 28 14:31:35 platon pulseaudio[3040]: alsa-util.c: Most likely this is a bug
> in the ALSA driver 'snd_intel8x0'. Please report this issue to the ALSA
> developers.
> Mar 28 14:31:35 platon pulseaudio[3040]: rtpoll.c: Assertion 'usec <=
> ((pa_usec_t) 1000000ULL)*60ULL*60ULL' failed at pulsecore/rtpoll.c:548,
> function pa_rtpoll_set_timer_relative(). Aborting.
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel at alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>