OK, i'm now running the V4.16.0 kernel: > craigster0@p51:/local/home/craigster0/Downloads/linux-kernel-4.16$ uname -r > 4.16.0-041600-generic
and clicking on the "speaker icon" on the menu bar at the bottom of the screen still shows "No output or input devices found". more importantly, trying to play audio with Amarok or Rhythmbox produces no audible signal. i also tried booting with the oldest kernel still installed on the box, vmlinuz-4.13.0-36-generic, which was installed well before this problem occurred and the sound still didn't work. to the best of my recollection. i don't think this problem was _caused_ by a kernel update. both speakers and microphone worked fine with all apps before i performed a software update, and failed after that. the trick is figuring out exactly which software update caused the problem! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1761051 Title: laptop sound broken in latest update -- "No output or input devices found" Status in linux package in Ubuntu: Incomplete Status in linux source package in Artful: Incomplete Bug description: after i installed the latest update for Kubuntu 17.10 my audio devices disappeared and i lost the ability to listen to music or play sounds on my laptop. it worked fine before the update! (Caveat: sometimes ads or youtube will play through the speakers or headphones but it is unpredictable and i have no control over volume or muting.) the Plasma Audio Volume settings show "No Output Devices Available" and "No Input Devices Available". it worked fine before the last update. this is a Lenovo P51, a fairly popular laptop for linux. my laptop is a high end version with an E3-1505M CPU and "hybrid graphics". i do not update the software every day so the problem may have been introduced upto two weeks ago, but no earlier then that. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: linux-image-4.13.0-37-generic 4.13.0-37.42 ProcVersionSignature: Ubuntu 4.13.0-37.42-generic 4.13.13 Uname: Linux 4.13.0-37-generic x86_64 ApportVersion: 2.20.7-0ubuntu3.7 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D2', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D10p', '/dev/snd/pcmC0D9p', '/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CurrentDesktop: KDE Date: Tue Apr 3 21:38:36 2018 HibernationDevice: RESUME=UUID=1c6e24a0-ad92-4e31-bad8-91d3ac06ee02 InstallationDate: Installed on 2018-01-12 (81 days ago) InstallationMedia: Kubuntu 17.10 "Artful Aardvark" - Release amd64 (20171017.1) MachineType: LENOVO 20HHCTO1WW ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-37-generic.efi.signed root=/dev/mapper/p51vg-root ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.13.0-37-generic N/A linux-backports-modules-4.13.0-37-generic N/A linux-firmware 1.169.3 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/13/2017 dmi.bios.vendor: LENOVO dmi.bios.version: N1UET31W (1.05 ) dmi.board.asset.tag: Not Available dmi.board.name: 20HHCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN1UET31W(1.05):bd02/13/2017:svnLENOVO:pn20HHCTO1WW:pvrThinkPadP51:rvnLENOVO:rn20HHCTO1WW:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad P51 dmi.product.name: 20HHCTO1WW dmi.product.version: ThinkPad P51 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761051/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
