<div dir="ltr"><div>I think the problem is coming from underruns and then rewinds. </div><div>Somehow i can see the audio coming with a latency of about 12 seconds .. and then PA crashed . </div><div> I: [alsa-sink] alsa-sink.c: Starting playback. I: [alsa-sink] pcm_hw.c: SNDRV_PCM_IOCTL_START failed (-77) D: [pulseaudio] module-suspend-on-idle.c: Sink alsa_output.default becomes busy. I: [pulseaudio] resampler.c: Forcing resampler 'copy', because of fixed, identical sample rates. D: [pulseaudio] resampler.c: Channel matrix: D: [pulseaudio] resampler.c: I00 D: [pulseaudio] resampler.c: +------ D: [pulseaudio] resampler.c: O00 | 1.000 D: [pulseaudio] resampler.c: O01 | 1.000 I: [pulseaudio] remap.c: Using mono to stereo remapping I: [pulseaudio] resampler.c: Using resampler 'copy' I: [pulseaudio] resampler.c: Using s16le as working format. D: [pulseaudio] memblockq.c: memblockq requested: maxlength=33554432, tlength=0, base=4, prebuf=0, minreq=1 maxrewind=0 D: [pulseaudio] memblockq.c: memblockq sanitized: maxlength=33554432, tlength=33554432, base=4, prebuf=0, minreq=4 maxrewind=0 I: [pulseaudio] sink-input.c: Created input 0 "/usr/share/sounds/alsa/Front_Center.wav" on alsa_output.default with sample spec s16le 1ch 48000Hz and channel map mono I: [pulseaudio] sink-input.c: media.format = "WAV (Microsoft)" I: [pulseaudio] sink-input.c: <a href="http://application.name" target="_blank">application.name</a> = "paplay" I: [pulseaudio] sink-input.c: <a href="http://media.name" target="_blank">media.name</a> = "/usr/share/sounds/alsa/Front_Center.wav" I: [pulseaudio] sink-input.c: native-protocol.peer = "UNIX socket client" I: [pulseaudio] sink-input.c: native-protocol.version = "26" I: [pulseaudio] sink-input.c: <a href="http://application.process.id" target="_blank">application.process.id</a> = "1649" I: [pulseaudio] sink-input.c: application.process.user = "root" I: [pulseaudio] sink-input.c: application.process.host = "10.195.245.138" I: [pulseaudio] sink-input.c: application.process.binary = "pacat" I: [pulseaudio] sink-input.c: application.language = "C" I: [pulseaudio] sink-input.c: application.process.machine_id = "10.195.245.138" I: [pulseaudio] sink-input.c: <a href="http://module-stream-restore.id" target="_blank">module-stream-restore.id</a> = "sink-input-by-application-name:paplay" I: [pulseaudio] protocol-native.c: Requested tlength=2000.00 ms, minreq=20.00 ms D: [pulseaudio] protocol-native.c: Traditional mode enabled, modifying sink usec only for compat with minreq. D: [pulseaudio] protocol-native.c: Requested latency=1960.00 ms, Received latency=185.76 ms D: [pulseaudio] memblockq.c: memblockq requested: maxlength=4194304, tlength=192000, base=2, prebuf=190082, minreq=1920 maxrewind=0 D: [pulseaudio] memblockq.c: memblockq sanitized: maxlength=4194304, tlength=192000, base=2, prebuf=190082, minreq=1920 maxrewind=0 I: [pulseaudio] protocol-native.c: Final latency 2185.76 ms = 1960.00 ms + 2*20.00 ms + 185.76 ms D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event. D: [alsa-sink] protocol-native.c: Requesting rewind due to end of underrun. D: [alsa-sink] sink-input.c: Do not do any rewind requests, seems to cause loss of audio samples </div> </div><div class="gmail_extra"> <div class="gmail_quote">On Tue, Jun 4, 2013 at 8:01 PM, David Henningsson <<a href="mailto:david.henningsson@canonical.com" target="_blank">david.henningsson@canonical.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5">On 06/05/2013 12:24 AM, D K wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> I am getting following error when i try to to paplay # paplay /usr/share/sounds/alsa/Front_Center.wav Failed to drain stream: Timeout Here PA is connected to alsa-driver for playback of sound. I am not sure about the problem here any pointers would be helpful. thanks, KD The detailed log is below. I: [pulseaudio] protocol-native.c: Got crede[ 421.525807] audio ] 1154_dai_hw_params is completed. ntials: uid=0 gid=0 success=1 D: [pulseaudio] p[ 421.534996] audio ] 1154_pcm_hw_params is completed. rotocol-native.c: SHM possible: yes D: [pulseau[ 421.545005] audio ] 1154_pcm_prepare is completed(ch:2)(bs:16)(sr:48000)(free:318644)(diff:285876). dio] protocol-native.c: Negotiated SHM: yes I: [ 421.558994] audio ] 1154_pcm_prepare is completed(ch:2)(bs:16)(sr:48000)(free:318644)(diff:285876). [pulseaudio] sink-input.c: Trying to change sample rate I: [pulseaudio] alsa-sink.c: Updating rate for device d[ 421.578020] BUG: scheduling while atomic: alsa-sink/4669/0x00000003 [ 421.585948] Modules linked in: tntfs(PO) venc_hxenc(PO) vdec_vdu(PO) dc_gm(O) pvrsrvkm(O) kdrv_lg115x(O) logfunnel(O) hma(O) [ 421.597232] [<800197b8>] (unwind_backtrace+0x0/0xf8) from [<8043458c>] (__schedule+0x49c/0x4fc) [ 421.605933] [<8043458c>] (__schedule+0x49c/0x4fc) from [<80432d70>] (schedule_timeout+0x138/0x1c8) [ 421.614901] [<80432d70>] (schedule_timeout+0x138/0x1c8) from [<8002d5a8>] (msleep_interruptible+0x34/0x44) [ 421.625106] [<8002d5a8>] (msleep_interruptible+0x34/0x44) from [<7f050da8>] (1154_pcm_trigger+0x74/0xf4 [kdrv_lg115x]) [ 421.636319] [<7f050da8>] (1154_pcm_trigger+0x74/0xf4 [kdrv_lg115x]) from [<8035bee8>] (soc_pcm_trigger+0x64/0xa0) [ 421.646761] [<8035bee8>] (soc_pcm_trigger+0x64/0xa0) from [<803339f0>] (snd_pcm_do_start+0x2c/0x30) [ 421.655806] [<803339f0>] (snd_pcm_do_start+0x2c/0x30) from [<80333698>] (snd_pcm_action_single+0x38/0x78) [ 421.665372] [<80333698>] (snd_pcm_action_single+0x38/0x78) from [<80338bb0>] (snd_pcm_lib_write1+0x2c8/0x314) [ 421.675284] [<80338bb0>] (snd_pcm_lib_write1+0x2c8/0x314) from [<80338ca4>] (snd_pcm_lib_write+0x50/0x5c) [ 421.684849] [<80338ca4>] (snd_pcm_lib_write+0x50/0x5c) from [<80335630>] (snd_pcm_playback_ioctl1+0x1a0/0x3e0) [ 421.694853] [<80335630>] (snd_pcm_playback_ioctl1+0x1a0/0x3e0) from [<800bc9d0>] (vfs_ioctl+0x30/0x70) [ 421.704157] [<800bc9d0>] (vfs_ioctl+0x30/0x70) from [<800bcb70>] (do_vfs_ioctl+0x68/0x524) [ 421.712418] [<800bcb70>] (do_vfs_ioctl+0x68/0x524) from [<800bd064>] (sys_ioctl+0x38/0x5c) [ 421.720688] [<800bd064>] (sys_ioctl+0x38/0x5c) from [<800135c0>] (ret_fast_syscall+0x0/0x30) </blockquote> </div></div> Whenever you get backtraces from the kernel like the lines above (starting with "BUG: scheduling while atomic") show you, you are looking at a kernel bug. You seem to be using some ASoC driver, so that's where I would look first. Aplay and PulseAudio are sometimes using the driver in slightly different ways, so even if aplay works that is not a guarantee that the fault is in PulseAudio.<div class="im"> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> efault, new rate is 48000 I: [p[ 421.730381] audio ] 1154_pcm_trigger is completed(cmd:1). ulseaudio] sink.c: Changed sampl[ 421.737677] audio ] 1154_dai_trigger is completed. ing rate successfully I: [pulseaudio] sink-input.c: Rate changed to 48000 Hz D: [pulseaudio] sink.c: Suspend cause of sink alsa_output.default is 0x0000, resuming I: [alsa-sink] alsa-sink.c: Trying resume... D: [alsa-sink] alsa-util.c: Maximum hw buffer size is 170 ms D: [alsa-sink] alsa-util.c: Set buffer size first (to 8192 samples), period size second (to 1024 samples). D: [alsa-sink] alsa-sink.c: hwbuf_unused=0 D: [alsa-sink] alsa-sink.c: setting avail_min=1 I: [alsa-sink] alsa-sink.c: Resumed successfully... D: [pulseaudio] module-suspend-on-idle.c: Sink alsa_output.default becomes idle, timeout in 5 seconds. I: [alsa-sink] alsa-sink.c: Starting playback. I: [alsa-sink] pcm_hw.c: SNDRV_PCM_IOCTL_START failed (-77) </blockquote> </div> It is also a bit weird that this error does not seem to propagate up and cause follow-up errors, but that's likely not the root cause here. <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im"> D: [pulseaudio] module-suspend-on-idle.c: Sink alsa_output.default becomes busy. I: [pulseaudio] resampler.c: Forcing resampler 'copy', because of fixed, identical sample rates. D: [pulseaudio] resampler.c: Channel matrix: D: [pulseaudio] resampler.c: I00 D: [pulseaudio] resampler.c: +------ D: [pulseaudio] resampler.c: O00 | 1.000 D: [pulseaudio] resampler.c: O01 | 1.000 I: [pulseaudio] remap.c: Using mono to stereo remapping I: [pulseaudio] resampler.c: Using resampler 'copy' I: [pulseaudio] resampler.c: Using s16le as working format. D: [pulseaudio] memblockq.c: memblockq requested: maxlength=33554432, tlength=0, base=4, prebuf=0, minreq=1 maxrewind=0 D: [pulseaudio] memblockq.c: memblockq sanitized: maxlength=33554432, tlength=33554432, base=4, prebuf=0, minreq=4 maxrewind=0 I: [pulseaudio] sink-input.c: Created input 0 "/usr/share/sounds/alsa/Front_Center.wav" on alsa_output.default with sample spec s16le 1ch 48000Hz and channel map mono I: [pulseaudio] sink-input.c: media.format = "WAV (Microsoft)" </div> I: [pulseaudio] sink-input.c: <a href="http://application.name" target="_blank">application.name</a> <<a href="http://application.name" target="_blank">http://application.name</a>> = "paplay" I: [pulseaudio] sink-input.c: <a href="http://media.name" target="_blank">media.name</a> <<a href="http://media.name" target="_blank">http://media.name</a>> =<div class="im"> "/usr/share/sounds/alsa/Front_Center.wav" I: [pulseaudio] sink-input.c: native-protocol.peer = "UNIX socket client" I: [pulseaudio] sink-input.c: native-protocol.version = "26" I: [pulseaudio] sink-input.c: <a href="http://application.process.id" target="_blank">application.process.id</a> </div> <<a href="http://application.process.id" target="_blank">http://application.process.id</a>> = "4735"<div class="im"> I: [pulseaudio] sink-input.c: application.process.user = "root" I: [pulseaudio] sink-input.c: application.process.host = "10.195.245.138" I: [pulseaudio] sink-input.c: application.process.binary = "pacat" I: [pulseaudio] sink-input.c: application.language = "C" I: [pulseaudio] sink-input.c: application.process.machine_id = "10.195.245.138" I: [pulseaudio] sink-input.c: <a href="http://module-stream-restore.id" target="_blank">module-stream-restore.id</a> </div> <<a href="http://module-stream-restore.id" target="_blank">http://module-stream-restore.id</a>> = "sink-input-by-application-name:paplay"<div><div class="h5"> I: [pulseaudio] protocol-native.c: Requested tlength=2000.00 ms, minreq=20.00 ms D: [pulseaudio] protocol-native.c: Traditional mode enabled, modifying sink usec only for compat with minreq. D: [pulseaudio] protocol-native.c: Requested latency=1960.00 ms, Received latency=185.76 ms D: [pulseaudio] memblockq.c: memblockq requested: maxlength=4194304, tlength=192000, base=2, prebuf=190082, minreq=1920 maxrewind=0 D: [pulseaudio] memblockq.c: memblockq sanitized: maxlength=4194304, tlength=192000, base=2, prebuf=190082, minreq=1920 maxrewind=0 I: [pulseaudio] protocol-native.c: Final latency 2185.76 ms = 1960.00 ms + 2*20.00 ms + 185.76 ms D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event. D: [alsa-sink] protocol-native.c: Requesting rewind due to end of underrun. D: [alsa-sink] sink-input.c: Do not do any rewind requests, seems to cause loss of audio samples D: [alsa-sink] alsa-sink.c: Requested to rewind 32768 bytes. D: [alsa-sink] alsa-sink.c: Limited to 30976 bytes. D: [alsa-sink] alsa-sink.c: before: 7744 D: [alsa-sink] alsa-sink.c: after: 7744 D: [alsa-sink] alsa-sink.c: Rewound 30976 bytes. D: [alsa-sink] sink.c: Processing rewind... D: [alsa-sink] source.c: Processing rewind... D: [pulseaudio] module-suspend-on-idle.c: Sink alsa_output.default becomes idle, timeout in 5 seconds. D: [pulseaudio] module-suspend-on-idle.c: Sink alsa_output.default becomes idle, timeout in 5 seconds. D: [pulseaudio] core.c: Hmm, no streams around, trying to vacuum. I: [pulseaudio] sink-input.c: Freeing input 0 "/usr/share/sounds/alsa/Front_Center.wav" I: [pulseaudio] client.c: Freed 0 "paplay" I: [pulseaudio] protocol-native.c: Connection died. </div></div> _______________________________________________ pulseaudio-discuss mailing list <a href="mailto:pulseaudio-discuss@lists.freedesktop.org" target="_blank">pulseaudio-discuss@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss" target="_blank">http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss</a> </blockquote> -- David Henningsson, Canonical Ltd. <a href="https://launchpad.net/~diwic" target="_blank">https://launchpad.net/~diwic</a> </blockquote></div> </div>