*** 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 -- You received this bug notification because you are a member of Desktop 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1539967/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp