** Also affects: linux-lts-xenial (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1620854
Title:
Audio playback works in slow motion after resume from suspension
Status in alsa-driver package in Ubuntu:
New
Status in linux-lts-xenial package in Ubuntu:
New
Bug description:
The audio playback through HDMI works in slow motion after a resume
from suspension.
Before the suspension the audio works as expected on both the "internal
speaker" and "HDMI" output cards.
When you suspend (and then resume) the system the audio playback starts
acting weird through the HDMI output card.
The audio is played in slow motion and you can also see that the time of
playback is going on slower than the time in real life.
Let me describe one of the tests I've performed.
I've booted the system and started playing a song in vlc.
I've opened the Ubuntu sound settings.
I've selected the "HDMI" output card and the playback worked as expected.
I've selected the "Internal speakers" output card and the playback worked as
expected.
Then I've closed vlc, suspended and then resumed the system.
I've started playing a song in vlc again.
I've opened the Ubuntu sound settings.
I've selected the "HDMI" output card and the playback started working in
slow motion: the audio was extremely slow and also the time indicator was
working slowly (5 seconds of the song were played in about 10 seconds "in real
life").
I've selected the "Internal speakers" output card and the playback started
working as expected again.
Please note that after a resume from suspension when you select the "Internal
speakers" card the bug disappears and when you select the "HDMI" card the bug
appears again.
I've tested this bug also with videos in vlc, in a browser and in totem. The
bug appears (or disappears) in the same way.
The bug affects every kind of audio, including system sounds.
Everything works fine before a suspension.
The only way I found to restore the before-suspension behavior is a reboot.
Steps to reproduce:
* Make sure this is a fresh boot (never suspended since the last boot).
* Play something with audio
(tested with: video in browser, song in vlc and Ubuntu speaker tests).
* Select "Speakers - Internal audio" as output device (Audio works as
expected).
* Select "HDMI - Internal audio" as output device (Audio works as expected).
* Stop the audio playback.
* Suspend and resume the system.
* Play something again.
* Select "Speakers - Internal audio" as output device (Audio works as
expected).
* Select "HDMI - Internal audio" as output device (The bug appears).
Expected behavior:
* Audio playback should work well through "Speakers - Internal audio" as
output device.
* Audio playback should work well through "HDMI - Internal audio" as output
device.
Actual behavior:
* Audio playback is working well through "Speakers - Internal audio" as
output device.
* Audio playback is working in slow motion through "HDMI - Internal audio"
as output device.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: riccardo 3492 F.... pulseaudio
/dev/snd/controlC1: riccardo 3492 F.... pulseaudio
CurrentDesktop: GNOME
Date: Tue Sep 6 23:36:10 2016
InstallationDate: Installed on 2016-04-22 (136 days ago)
InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Release amd64
(20160421)
PackageArchitecture: all
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=it_IT.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Audio interno - HDA Intel PCH
Symptom_Type: Sound works for a while, then breaks
Title: [HDA-Intel - HDA Intel HDMI, playback] fails after a while
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/22/2014
dmi.bios.vendor: Insyde
dmi.bios.version: F.30
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 229D
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 78.13
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnInsyde:bvrF.30:bd10/22/2014:svnHewlett-Packard:pnHPENVY17NotebookPC:pvr0973120000405F10000620180:rvnHewlett-Packard:rn229D:rvr78.13:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP ENVY 17 Notebook PC
dmi.product.version: 0973120000405F10000620180
dmi.sys.vendor: Hewlett-Packard
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