Public bug reported:
Some "unusual" sound usage patterns like seeking streaming media get the driver
into a distorted state, where high-frequency chirps are added to all sound
played.
Seen on natty & precise (not tested on others), on natty modprobe-cycled the
driver to workaround the issue, on precise "pasuspender alsactl init" seems to
be enough to get the driver play sanely again.
Easiest way so far to reproduce this seems to be running speech-
dispatcher (started by launching mumble & quitting it) and firefox with
html5 youtube at same time, playing some video with speech-only content
where distortions are easiest to notice and seeking that forward and
backward 10-20 times. Might be related to concurrently running
applications with different sampling rates and making them interrupt
playback at "inconvenient" times from the driver's point of view.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
Uname: Linux 3.2.0-21-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0-0ubuntu2
Architecture: amd64
Date: Fri Apr 6 15:31:11 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120112)
PackageArchitecture: all
ProcEnviron:
LANGUAGE=en_IE:en
TERM=xterm
LANG=en_IE.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Black Line Out, Rear
Symptom_Type: Sound works for a while, then breaks
Title: [System Product Name, Realtek ALC892, Black Line Out, Rear] fails after
a while
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/25/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0704
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8B WS
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr0704:bd07/25/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP8BWS:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug natty precise
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/975135
Title:
[P8B WS, Realtek ALC892, Black Line Out, Rear] fails after a while
(distortions after seek of streaming media)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/975135/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
