[GA-MA770T-UD3P, Realtek ALC888] Distorted crackling noise when used with low latency clients
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
pulseaudio (Ubuntu) |
Expired
|
Undecided
|
Unassigned |
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~
Adding the "tsched=0" setting to /etc/pulse/
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/
fluidsynth -nia alsa is also problematic, EXCEPT when I specify "-o 'audio.
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: alsa-base 1.0.25+
ProcVersionSign
Uname: Linux 3.5.0-19-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
/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
PackageArchitec
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_
Symptom_Card: Built-in Audio - HDA ATI SB
Symptom_Jack: Green Line Out, Rear
Symptom_
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:bvnAwardSof
dmi.product.name: GA-MA770T-UD3P
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
>>fluidsynth -nia alsa is also problematic, EXCEPT when I specify "-o 'audio. alsa.device= hw'".
do you mean those apllication which require low latency only work with alsa device hw
pulseaudio or alsa pulse plugin does not work well wiyth those low latency application ?