*** This bug is a duplicate of bug 1274115 ***
https://bugs.launchpad.net/bugs/1274115
Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1274115, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report. Feel free to continue to report any other bugs you may
find.
** This bug has been marked a duplicate of bug 1274115
snd_pcm_avail() returned a value that is exceptionally large
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Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1539967
Title:
Audio skips (buffer underruns) intermittently but particularly when
screen blanks
Status in alsa-driver package in Ubuntu:
Confirmed
Bug description:
Audio playback via ALSA (snd_intel_hda) & pulseaudio inevitably
'skips' (repeats buffer content) intermittently a few times each hour,
and severely whenever the screen is blanked for inactivity.
CPU load is low (mostly idle).
I didn't have this problem with my previous fresh installation of
Ubuntu (14.04.3 LTS) on this hardware.
From dmesg, kernel appears to be using the TSC clocksource:
[ 3.180127] clocksource: Switched to clocksource tsc
Upon startup, Pulseaudio sees high resolution timers:
I: [pulseaudio] main.c: Fresh high-resolution timers available! Bon appetit!
When audio skips, alsa-sink.c logs a massive scheduling delay (e.g.
1070.00 ms > 15.99 ms) and also that "snd_pcm_avail() returned a value
that is exceptionally large: 623124 bytes (1177 ms)"
Currently running Ubuntu 15.10 Wily (fresh install).
linux-sound-base:
Installed: 1.0.25+dfsg-0ubuntu5
pulseaudio:
Installed: 1:6.0-0ubuntu13
Audio output used is Built-in Audio Analogue Surround 5.1 (motherboard
audio, Realtek ALC889A)
Attaching log from pulseaudio -vvvv
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.2.0-25.30-generic 4.2.6
Uname: Linux 4.2.0-25-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl fglrx
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC0D0p: chinf 7928 F...m pulseaudio
/dev/snd/controlC0: chinf 7928 F.... pulseaudio
/dev/snd/controlC1: chinf 7928 F.... pulseaudio
CurrentDesktop: Unity
Date: Sat Jan 30 18:17:01 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-12-11 (50 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Built-in Audio - HDA ATI SB
Symptom_Jack: Green Line Out, Rear
Symptom_Type: Sound works for a while, then breaks
Title: [GA-MA790GP-DS4H, Realtek ALC889A, Green Line Out, Rear] fails after a
while
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/16/2009
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F6
dmi.board.name: GA-MA790GP-DS4H
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.:bvrF6:bd09/16/2009:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA790GP-DS4H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA790GP-DS4H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-MA790GP-DS4H
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2016-01-12T14:13:00.166647
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