Comment 0 for bug 1877757

New focal installation on a new Acer Swift 3 laptop with core i7-1065G7.
No sound detected, KDE/pavucontrol shows Dummy output.
External headset also not detected.

I've googled around and tried to reinstall alsa and pulseaudio, tried alsa force-reload as well. Nothing helps.

With snd_hda_intel.dmic_detect=0 speakers start working but microphone is not detected. External headset detected with both headphones and mic. I use this as a workaround for a time being.

I've checked https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1860697 bug. It is closed and use recent kernel and firmware but it does not fix my issue.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-29-generic 5.4.0-29.33
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Sat May 9 18:56:15 2020
InstallationDate: Installed on 2020-04-24 (15 days ago)
InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: Acer Swift SF314-57G
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-29-generic root=UUID=faf6a132-de60-44fa-a1a7-4cce8ef83b87 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-29-generic N/A
 linux-backports-modules-5.4.0-29-generic N/A
 linux-firmware 1.187
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/24/2019
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.09
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: Floris_IL
dmi.board.vendor: IL
dmi.board.version: V1.09
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.09:bd09/24/2019:svnAcer:pnSwiftSF314-57G:pvrV1.09:rvnIL:rnFloris_IL:rvrV1.09:cvnAcer:ct10:cvrChassisVersion:
dmi.product.family: Swift 3
dmi.product.name: Swift SF314-57G
dmi.product.sku: 0000000000000000
dmi.product.version: V1.09
dmi.sys.vendor: Acer