(In reply to rkfg from comment #7) > Created attachment 113083 [details] > Underruns with prealloc=2048 > > I was able to leverage the "Underrun!" issue by setting prealloc to 2048 in > kernel options (recompiled it). It can also be achieved via echo 2048 > > /proc/asound/card0/pcm0p/sub0/prealloc without recompiling. Wonder why 64 is > still default in Debian/Ubuntu. So it doesn't change the latency/watermark > now this hard. However, I still get "Underrun!" after launching LMMS. It > also spams the syslog with > > Feb 03 08:58:35 work pulseaudio[1895]: Pool full > > And there are still clicks in the playback from time to time.
do your lmms using 256 frames buffer 5.80 ms ? try change audio to alsa and change default to hw:0 if you want low latency -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/996906 Title: periodic audio skips with Intel HDA Status in PulseAudio sound server: Confirmed Status in pulseaudio package in Ubuntu: Confirmed Bug description: When running PulseAudio, if I'm playing music via any source (Exaile, Totem, Flash in Firefox or Chromium, VLC, etc.) every few minutes the audio will skip once or twice. top doesn't show any process eating CPU any more when it happens. dmesg doesn't show anything. Nothing else seems to be affected. It doesn't seem to happen regularly. I just installed Ubuntu 12.04 from scratch (with pulseaudio 1:1.1-0ubuntu15), but the same thing happened in 10.04 on the same hardware. Uninstalling the PulseAudio packages and going back to ALSA gives me no issues whatsoever, which is how I know the issue is with PulseAudio. I'm using my onboard audio device: $ lspci | grep Audio 00:14.2 Audio device: Advanced Micro Devices [AMD] nee ATI SBx00 Azalia (Intel HDA) Following mailing list instructions, pulseaudio -vvvv --log-time shows during a skip: ( 684.030| 5.000) I: [alsa-sink] alsa-sink.c: Underrun! ( 684.030| 0.000) I: [alsa-sink] alsa-sink.c: Increasing minimal latency to 26.00 ms ( 684.030| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 26.00ms ( 684.030| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=60952 ( 684.030| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=15944 ( 684.030| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 26.00ms ( 684.030| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=60952 ( 684.030| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=15944 ( 684.031| 0.000) D: [alsa-sink] protocol-native.c: Underrun on 'ALSA Playback', 0 bytes in queue. ( 684.036| 0.004) D: [alsa-sink] protocol-native.c: Requesting rewind due to end of underrun. ( 684.036| 0.000) D: [alsa-sink] alsa-sink.c: Requested to rewind 10940 bytes. ( 684.036| 0.000) D: [alsa-sink] alsa-sink.c: Limited to 3320 bytes. ( 684.036| 0.000) D: [alsa-sink] alsa-sink.c: before: 830 ( 684.036| 0.000) D: [alsa-sink] alsa-sink.c: after: 830 ( 684.036| 0.000) D: [alsa-sink] alsa-sink.c: Rewound 3320 bytes. ( 684.036| 0.000) D: [alsa-sink] sink.c: Processing rewind... ( 684.036| 0.000) D: [alsa-sink] sink.c: latency = 1337 ( 684.036| 0.000) D: [alsa-sink] sink-input.c: Have to rewind 3320 bytes on render memblockq. ( 684.036| 0.000) D: [alsa-sink] source.c: Processing rewind... ( 696.234| 12.197) I: [alsa-sink] alsa-sink.c: Underrun! ( 696.234| 0.000) I: [alsa-sink] alsa-sink.c: Increasing wakeup watermark to 15.99 ms ( 702.033| 5.799) I: [alsa-sink] alsa-sink.c: Underrun! ( 702.033| 0.000) I: [alsa-sink] alsa-sink.c: Increasing minimal latency to 36.00 ms ( 702.033| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 36.00ms ( 702.033| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=59188 ( 702.033| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=15680 ( 702.033| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 36.00ms ( 702.034| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=59188 ( 702.034| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=15680 ( 702.034| 0.000) D: [alsa-sink] protocol-native.c: Underrun on 'ALSA Playback', 0 bytes in queue. ...and it goes on. The "Underrun!" messages alone happened a few times before, but it didn't skip. I'd like to use PulseAudio, but it's pretty annoying having audio skip all the time. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: pulseaudio 1:1.1-0ubuntu15 ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14 Uname: Linux 3.2.0-24-generic x86_64 NonfreeKernelModules: nvidia AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: toxite 2136 F.... pulseaudio /dev/snd/pcmC0D0p: toxite 2136 F...m pulseaudio Card0.Amixer.info: Card hw:0 'SB'/'HDA ATI SB at 0xfe024000 irq 16' Mixer name : 'Realtek ALC889' Components : 'HDA:10ec0889,1458a102,00100004' Controls : 48 Simple ctrls : 22 Date: Tue May 8 21:45:17 2012 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) ProcEnviron: TERM=xterm PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: pulseaudio UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/03/2009 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F2 dmi.board.name: GA-790FXTA-UD5 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF2:bd12/03/2009:svnGigabyteTechnologyCo.,Ltd.:pnGA-790FXTA-UD5:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-790FXTA-UD5:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-790FXTA-UD5 dmi.sys.vendor: Gigabyte Technology Co., Ltd. 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