Public bug reported:
This is a terrible bug:
I have my speakers attached to my monitor, so sound is played via
Displayport audio. No problem at all.
BUT: My monitor goes to sleep after 10 minutes or so. When it's woken up
again, no sound whatsoever is played back any more. Going to audio
settings still shows Displayport/HDMI audio selected.
When I switch my monitor OFF and ON again, sound is back.
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.8.0-20.31-generic 3.8.11
Uname: Linux 3.8.0-20-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: zordid 2563 F.... pulseaudio
/dev/snd/controlC0: zordid 2563 F.... pulseaudio
Date: Sat May 11 15:28:28 2013
InstallationDate: Installed on 2011-10-15 (573 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia failed
Symptom_Card: GF106 High Definition Audio Controller - HDA NVidia
Symptom_DevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: zordid 2563 F.... pulseaudio
/dev/snd/controlC0: zordid 2563 F.... pulseaudio
Symptom_Jack: Digital Out, HDMI
Symptom_Type: No sound at all
Title: [Dell System XPS L702X, Nvidia GPU 11 HDMI/DP, Digital Out, HDMI] No
sound at all
UpgradeStatus: Upgraded to raring on 2013-04-28 (12 days ago)
dmi.bios.date: 09/07/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A19
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 03RG89
dmi.board.vendor: Dell Inc.
dmi.board.version: FAB1
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias:
dmi:bvnDellInc.:bvrA19:bd09/07/2012:svnDellInc.:pnDellSystemXPSL702X:pvr:rvnDellInc.:rn03RG89:rvrFAB1:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L702X
dmi.sys.vendor: Dell Inc.
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug raring
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https://bugs.launchpad.net/bugs/1178976
Title:
After monitor stand-by, Displayport audio is dead until monitor is
"restarted"
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