[pulseaudio-discuss] Failed to drain stream: Timeout

Tue Jun 4 20:01:50 PDT 2013

On 06/05/2013 12:24 AM, D K wrote:
> 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)

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.

> 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)

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.

> 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: application.name <http://application.name>
> = "paplay"
> I: [pulseaudio] sink-input.c: media.name <http://media.name> =
> "/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: application.process.id
> <http://application.process.id> = "4735"
> 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: module-stream-restore.id
> <http://module-stream-restore.id> = "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
> 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.
>
>
>
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-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic