#396: Sound is Jerky with "AC'97" hardware (on Mandriva Cooker)
----------------------+-----------------------------------------------------
Reporter: shlomif | Owner: lennart
Type: defect | Status: new
Priority: highest | Milestone:
Component: core | Severity: major
Resolution: | Keywords: sound, jerky, bad, playback, artifacts,
voice, play, ac 97
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Comment (by nevion):
Setting tsched=0 made it work again (mplayer even unpauses reliably!
though its a bit laggy for 2 secs). But now I get tons of these messages:
{{{
E: module-alsa-sink.c: ALSA woke us up to write new data to the device,
but there was actually nothing to write! Most likely this is an ALSA
driver bug. Please report this issue to the PulseAudio developers.
}}}
I was interested if this (tsched=1) was likely a timing error like the
creative cards. Here's what pa prints:
{{{
D: alsa-util.c: snd_pcm_dump():
D: alsa-util.c: Hardware PCM card 0 'NVidia CK804' device 0 subdevice 0
D: alsa-util.c: Its setup is:
D: alsa-util.c: stream : CAPTURE
D: alsa-util.c: access : MMAP_INTERLEAVED
D: alsa-util.c: format : S16_LE
D: alsa-util.c: subformat : STD
D: alsa-util.c: channels : 2
D: alsa-util.c: rate : 48000
D: alsa-util.c: exact rate : 48000 (48000/1)
D: alsa-util.c: msbits : 16
D: alsa-util.c: buffer_size : 16128
D: alsa-util.c: period_size : 1008
D: alsa-util.c: period_time : 21000
D: alsa-util.c: tstamp_mode : NONE
D: alsa-util.c: period_step : 1
D: alsa-util.c: avail_min : 1008
D: alsa-util.c: period_event : 0
D: alsa-util.c: start_threshold : -1
D: alsa-util.c: stop_threshold : -1
D: alsa-util.c: silence_threshold: 0
D: alsa-util.c: silence_size : 0
D: alsa-util.c: boundary : 9079256848778919936
}}}
Does anything look particularly erroneous? boundary is awfully big...
also, for exact rate, I think this card actually operates at 47khz or so.
--
Ticket URL: <http://www.pulseaudio.org/ticket/396#comment:14>
PulseAudio <http://pulseaudio.org/>
The PulseAudio Sound Server
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