I just found a fix here:
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1720519
You have to remove and reinstall alsa-base and pulseaudio.
I figured it out when I tried to start pulseaudio directly, and got this
error message:
W: [pulseaudio] module.c: module-combine is deprecated: Please use
module-combine-sink instead of module-combine!
W: [pulseaudio] module-combine.c: We will now load module-combine-sink. Please
make sure to remove module-combine from your configuration.
E: [pulseaudio] module.c: Module "module-switch-on-connect" should be loaded
once at most. Refusing to load.
E: [pulseaudio] main.c: Module load failed.
E: [pulseaudio] main.c: Hintergrunddienst konnte nicht initialisiert werden.
After
sudo apt-get remove --purge alsa-base pulseaudio
sudo apt-get install alsa-base pulseaudio
sudo alsa force-reload
It works again.
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https://bugs.launchpad.net/bugs/1728587
Title:
No audio device after upgrade to Kubuntu 17.10
Status in pulseaudio package in Ubuntu:
New
Bug description:
After upgrading Kubuntu 17.04 to 17.10, KDE lost the audio device
(Realtek sound card on a Lenovo Thinkpad T470s). Volume icon is on
mute, with info-popup given: "No output or input devices found". Audio
backend is Phonon GStreamer. Re-installing pulseaudio didn't help.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: pulseaudio 1:10.0-2ubuntu3
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.1
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: Mon Oct 30 13:58:15 2017
InstallationDate: Installed on 2017-08-25 (66 days ago)
InstallationMedia: Kubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
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: Upgraded to artful on 2017-10-30 (0 days ago)
dmi.bios.date: 04/17/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: N1WET31W (1.10 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20HFCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40700 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrN1WET31W(1.10):bd04/17/2017:svnLENOVO:pn20HFCTO1WW:pvrThinkPadT470s:rvnLENOVO:rn20HFCTO1WW:rvrSDK0J40700WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T470s
dmi.product.name: 20HFCTO1WW
dmi.product.version: ThinkPad T470s
dmi.sys.vendor: LENOVO
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