are your ata2 disk failing ?
19.633591] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 19.633593] sd 1:0:0:0: [sdb] [ 19.633595] Sense Key : Medium Error [current] [descriptor] [ 19.633598] Descriptor sense data with sense descriptors (in hex): [ 19.633600] 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00 [ 19.633608] 00 5d 69 c0 [ 19.633612] sd 1:0:0:0: [sdb] [ 19.633615] Add. Sense: Unrecovered read error - auto reallocate failed [ 19.633617] sd 1:0:0:0: [sdb] CDB: [ 19.633619] Read(10): 28 00 00 5d 69 c0 00 00 08 00 [ 19.633627] end_request: I/O error, dev sdb, sector 6121920 [ 19.633642] ata2: EH complete [ 20.009267] ata2.00: exception Emask 0x0 SAct 0x180000 SErr 0x0 action 0x0 [ 20.009276] ata2.00: irq_stat 0x40000008 [ 20.009284] ata2.00: failed command: READ FPDMA QUEUED [ 20.009296] ata2.00: cmd 60/08:98:c0:69:5d/00:00:00:00:00/40 tag 19 ncq 4096 in [ 20.009296] res 41/40:08:c0:69:5d/00:00:00:00:00/00 Emask 0x409 (media error) <F> [ 20.009302] ata2.00: status: { DRDY ERR } [ 20.009306] ata2.00: error: { UNC } [ 20.010541] ata2.00: configured for UDMA/100 [ 20.010567] sd 1:0:0:0: [sdb] Unhandled sense code [ 20.010570] sd 1:0:0:0: [sdb] [ 20.010571] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 20.010573] sd 1:0:0:0: [sdb] [ 20.010575] Sense Key : Medium Error [current] [descriptor] [ 20.010577] Descriptor sense data with sense descriptors (in hex): [ 20.010578] 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00 [ 20.010583] 00 5d 69 c0 [ 20.010586] sd 1:0:0:0: [sdb] [ 20.010588] Add. Sense: Unrecovered read error - auto reallocate failed -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1458722 Title: after update, no sound Status in pulseaudio package in Ubuntu: New Bug description: after a normal update, sound gives error of "Failed to set the selected audio output device". This error is in the audio/video system settings. pulseaudio does not seem to be running, and won't start with pulseaudio --start command. More than happy to provide additional info if needed. This is Ubuntu 14.04.2 LTS, fresh install a few months ago, audio was working as expected up until update to 3.13.0-53 kernel. Reverting the kernel with grub back to earlier ones did not restore the audio. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: pulseaudio 1:4.0-0ubuntu11.1 ProcVersionSignature: Ubuntu 3.13.0-53.89-generic 3.13.11-ckt19 Uname: Linux 3.13.0-53-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.11 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: leperas 1954 F.... kded4 leperas 2062 F.... kmix CurrentDesktop: KDE Date: Mon May 25 23:19:38 2015 InstallationDate: Installed on 2015-03-14 (73 days ago) InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. SourcePackage: pulseaudio Symptom: audio UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/15/2013 dmi.bios.vendor: Insyde Corp. dmi.bios.version: V2.22 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: MA40_HX dmi.board.vendor: Acer dmi.board.version: Type2 - A01 Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Chassis Manufacturer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.22:bd04/15/2013:svnAcer:pnAspireM5-481PT:pvrV2.22:rvnAcer:rnMA40_HX:rvrType2-A01BoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion: dmi.product.name: Aspire M5-481PT dmi.product.version: V2.22 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1458722/+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