It looks like a pulseaudio issue. Please generate a log: https://wiki.ubuntu.com/PulseAudio/Log
** Summary changed: - sound not working + [HP Pavilion dv2000, Conexant CX20551] No sound -- 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/1086181 Title: [HP Pavilion dv2000, Conexant CX20551] No sound Status in “alsa-driver” package in Ubuntu: New Bug description: the sound stopped working even on root user ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: alsa-base 1.0.25+dfsg-0ubuntu3 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic i686 ApportVersion: 2.6.1-0ubuntu7 Architecture: i386 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Tue Dec 4 00:47:10 2012 InstallationDate: Installed on 2012-11-22 (11 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2) MarkForUpload: True PackageArchitecture: all PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. SourcePackage: alsa-driver Symptom: audio UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/11/2006 dmi.bios.vendor: Phoenix dmi.bios.version: F.11 dmi.board.name: 30B2 dmi.board.vendor: Wistron dmi.board.version: 61.44 dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenix:bvrF.11:bd09/11/2006:svnHewlett-Packard:pnHPPaviliondv2000(RG498UA#ABA):pvrF.11:rvnWistron:rn30B2:rvr61.44:cvnHewlett-Packard:ct10:cvrN/A: dmi.product.name: HP Pavilion dv2000 (RG498UA#ABA) dmi.product.version: F.11 dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1086181/+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