laptop sound broken in latest update -- "No output or input devices found"
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Expired
|
Medium
|
Unassigned | ||
Artful |
Expired
|
Medium
|
Unassigned |
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-
ProcVersionSign
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/
CurrentDesktop: KDE
Date: Tue Apr 3 21:38:36 2018
HibernationDevice: RESUME=
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=
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageV
linux-
linux-
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.
dmi.board.name: 20HHCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.family: ThinkPad P51
dmi.product.name: 20HHCTO1WW
dmi.product.
dmi.sys.vendor: LENOVO
tags: | added: kernel-bug-exists-upstream |
i'm wondering whether i should try rolling back to the previous kernel version. (i didn't notice any updates to sound drivers or software when i reviewed the packages to be upgraded, but i may have missed something.)