Public bug reported:
After a while (between 5 and 10min), the output of my MOTU Ultralite AVB
usb sound card gets dirtier and faintier (sounds like a bitcrushing
effect) until there is no sound anymore. Sometimes muting the sound and
switching to internal audio device and back to the motu will make the
sound clean again, sometimes not. The Motu works ok with windows.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: alsa-base (not installed)
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Jul 19 16:52:34 2018
InstallationDate: Installed on 2016-05-01 (809 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: UltraLite AVB Baptiste - UltraLite AVB Baptiste
Symptom_PulseAudioLog:
juil. 19 16:29:48 multivac pulseaudio[1945]: [autospawn] core-util.c: Home
directory not accessible: Permission non accordée
juil. 19 16:29:48 multivac pulseaudio[1945]: [autospawn] lock-autospawn.c:
Impossible d'accèder au verrou autonome.
juil. 19 16:29:48 multivac pulseaudio[1945]: [pulseaudio] main.c: Failed to
acquire autospawn lock
juil. 19 16:30:00 multivac dbus-daemon[1441]: [system] Activating via systemd:
service name='org.freedesktop.RealtimeKit1' unit='rtkit-daemon.service'
requested by ':1.52' (uid=108 pid=3980 comm="/usr/bin/pulseaudio --start
--log-target=syslog " label="unconfined")
juil. 19 16:30:06 multivac systemd[1]: session-c1.scope: Killing process 3980
(pulseaudio) with signal SIGTERM.
Symptom_Type: Sound works for a while, then breaks
Title: [USB-Audio - UltraLite AVB Baptiste, playback] fails after a while
UpgradeStatus: Upgraded to bionic on 2018-05-29 (50 days ago)
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1782597
Title:
Output of my USB audio device gets progressively bitcrushed
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