When playing videos on YouTube in HTML5 instead of Flash Player, at times during playback, the sound skips in places. If you go into the "System Monitor", select "PulseAudio", right-click and select "Stop Process" and then click "Continue Process", the problem goes away until next time.
It happens at random. I find this problem is most likely to happen when clicking the time bar to watch the video at a specific time or replaying the video.
It only happens on HTML5 videos.
By chance I found that stopping and starting PulseAudio is a temporary "fix" each time this sound skipping occurs.
Since I prefer HTML5 to Flash, for obvious reasons ;) I now watch more HTML5 videos. I have joined the HTML5 trial on YouTube, which means most videos are in HTML5 instead of Flash:
www.youtube.com/html5
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: pulseaudio 1:0.9.22+stable-queue-24-g67d18-0ubuntu3.1
ProcVersionSignature: Ubuntu 2.6.38-13.55-generic 2.6.38.8
Uname: Linux 2.6.38-13-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: david 3249 F.... pulseaudio
/dev/snd/controlC1: david 3249 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xfa620000 irq 60'
Mixer name : 'Realtek ALC892'
Components : 'HDA:10ec0892,10438436,00100302'
Controls : 32
Simple ctrls : 18
Card1.Amixer.info:
Card hw:1 'default'/'AKM AK5370 at usb-0000:00:1a.0-1.5, full speed'
Mixer name : 'USB Mixer'
Components : 'USB0556:0001'
Controls : 2
Simple ctrls : 1
Card1.Amixer.values:
Simple mixer control 'Mic',0
Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
Capture channels: Mono
Limits: Capture 0 - 78
Mono: Capture 78 [100%] [20.00dB] [on]
Card2.Amixer.info:
Card hw:2 'NVidia'/'HDA NVidia at 0xfa080000 irq 17'
Mixer name : 'Nvidia GPU 16 HDMI/DP'
Components : 'HDA:10de0016,10de0101,00100100'
Controls : 16
Simple ctrls : 4
Date: Mon Feb 27 20:51:57 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcEnviron:
LANGUAGE=en_GB:en
LANG=en_GB.UTF-8
SHELL=/bin/bash
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/09/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1904
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: SABERTOOTH P67
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.:bvr1904:bd08/09/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnSABERTOOTHP67:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
Status changed to 'Confirmed' because the bug affects multiple users.