Probably a kernel bug.
The sound card isn't detected in 5.3.0-41-generic Booting 5.3.0-40-generic does work.
The relevant dmesg message is:
[ 9.845441] skl_hda_dsp_generic skl_hda_dsp_generic: Unsupported HDAudio/iDisp configuration found [ 9.845447] skl_hda_dsp_generic: probe of skl_hda_dsp_generic failed with error -22
ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 5.3.0-41.33-generic 5.3.18 Uname: Linux 5.3.0-41-generic x86_64 ApportVersion: 2.20.11-0ubuntu8.4 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CurrentDesktop: ubuntu:GNOME Date: Thu Feb 20 16:46:21 2020 InstallationDate: Installed on 2019-10-07 (136 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Title: PCI/internal sound card not detected UpgradeStatus: Upgraded to eoan on 2019-11-19 (93 days ago) dmi.bios.date: 01/15/2020 dmi.bios.vendor: LENOVO dmi.bios.version: N2HET44W (1.27 ) dmi.board.asset.tag: Not Available dmi.board.name: 20QDCTO1WW 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:bvrN2HET44W(1.27):bd01/15/2020:svnLENOVO:pn20QDCTO1WW:pvrThinkPadX1Carbon7th:rvnLENOVO:rn20QDCTO1WW:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Carbon 7th dmi.product.name: 20QDCTO1WW dmi.product.sku: LENOVO_MT_20QD_BU_Think_FM_ThinkPad X1 Carbon 7th dmi.product.version: ThinkPad X1 Carbon 7th dmi.sys.vendor: LENOVO
Probably a kernel bug.
The sound card isn't detected in 5.3.0-41-generic
Booting 5.3.0-40-generic does work.
The relevant dmesg message is:
[ 9.845441] skl_hda_dsp_generic skl_hda_ dsp_generic: Unsupported HDAudio/iDisp configuration found dsp_generic: probe of skl_hda_dsp_generic failed with error -22
[ 9.845447] skl_hda_
ProblemType: Bug dfsg-0ubuntu5 ature: Ubuntu 5.3.0-41.33-generic 5.3.18 ture: all asset.tag: Not Available asset.tag: No Asset Information version: None bvrN2HET44W( 1.27):bd01/ 15/2020: svnLENOVO: pn20QDCTO1WW: pvrThinkPadX1Ca rbon7th: rvnLENOVO: rn20QDCTO1WW: rvrSDK0J40697WI N:cvnLENOVO: ct10:cvrNone: MT_20QD_ BU_Think_ FM_ThinkPad X1 Carbon 7th version: ThinkPad X1 Carbon 7th
DistroRelease: Ubuntu 19.10
Package: alsa-base 1.0.25+
ProcVersionSign
Uname: Linux 5.3.0-41-generic x86_64
ApportVersion: 2.20.11-0ubuntu8.4
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: ubuntu:GNOME
Date: Thu Feb 20 16:46:21 2020
InstallationDate: Installed on 2019-10-07 (136 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
PackageArchitec
SourcePackage: alsa-driver
Symptom: audio
Title: PCI/internal sound card not detected
UpgradeStatus: Upgraded to eoan on 2019-11-19 (93 days ago)
dmi.bios.date: 01/15/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: N2HET44W (1.27 )
dmi.board.
dmi.board.name: 20QDCTO1WW
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 X1 Carbon 7th
dmi.product.name: 20QDCTO1WW
dmi.product.sku: LENOVO_
dmi.product.
dmi.sys.vendor: LENOVO