Thank you for reporting this bug to Ubuntu. Ubuntu 12.10 (quantal) reached end-of-life on May 16, 2014.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. ** Changed in: pulseaudio (Ubuntu) Status: New => Incomplete -- 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/1087916 Title: [GA-MA770T-UD3P, Realtek ALC888] Distorted crackling noise when used with low latency clients Status in pulseaudio package in Ubuntu: Incomplete Bug description: Description: In certain applications, including FluidSynth (and sometimes VLC) yet not Rhythmbox, the onboard audio of the Gigabyte GA-MA770T-UD3P (rev. 1.0) motherboard "sort of" works; there is a loud, distorted crackling noise mixed with the audio. A different, more "ordinary" crackle occurs in audio recorded using Sound Recorder and Skype. Both playback and recording in 12.04 and 12.10 are affected. I do not remember how well the audio worked in 11.10. Sometimes, after some time has elapsed, or when other applications (e.g. Flash plugin) are opened, the crackle goes away. In fact, it did go away a couple seconds after I clicked Apport's "Close" button after reproducing the bug using the steps below. Workarounds I tried: Upgrading to the latest DKMS driver snapshot (dkms-hda - 0.201212071018~quantal1) made no difference. "position_fix=1" made no difference either (perhaps that was already in use). "position_fix=2" removed the crackle but caused a sound I can best describe as "CD skipping". Adding the "tsched=0" setting to /etc/pulse/default.pa did work for playback. However, this did not fix recording in the aforementioned applications. Steps to reproduce (on my hardware): 1. sudo apt-get install fluid-soundfont-gm fluid-soundfont-gs fluidsynth 2. pulseaudio -k 3. fluidsynth -nia pulseaudio /usr/share/sounds/sf2/*.sf2 foo.mid fluidsynth -nia alsa is also problematic, EXCEPT when I specify "-o 'audio.alsa.device=hw'". ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: alsa-base 1.0.25+dfsg-0ubuntu3 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: ki 2598 F.... pulseaudio /dev/snd/controlC0: ki 2598 F.... pulseaudio /dev/snd/pcmC0D0p: ki 2598 F...m pulseaudio Date: Fri Dec 7 22:31:35 2012 InstallationDate: Installed on 2012-03-13 (269 days ago) InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111011) MarkForUpload: True PackageArchitecture: all ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:SB successful Symptom_Card: Built-in Audio - HDA ATI SB Symptom_Jack: Green Line Out, Rear Symptom_PulsePlaybackTest: PulseAudio playback test successful Symptom_Type: Underruns, dropouts, or "crackling" sound Title: [GA-MA770T-UD3P, Realtek ALC888, Green Line Out, Rear] Underruns, dropouts or crackling sound UpgradeStatus: Upgraded to quantal on 2012-12-08 (0 days ago) dmi.bios.date: 03/22/2011 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F12 dmi.board.name: GA-MA770T-UD3P dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF12:bd03/22/2011:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA770T-UD3P:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA770T-UD3P:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-MA770T-UD3P dmi.sys.vendor: Gigabyte Technology Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1087916/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
