Public bug reported:
It looks like 20.04 is now using sound open firmware (sof), however, sof does
not have a driver(?) for Intel Comet Lake processors (which my Lenovo X1 Carbon
Gen 7 laptop has). Here is the relevant output of dmesg:
[ 3.272336] sof-audio-pci 0000:00:1f.3: warning: No matching ASoC machine
driver found
[ 3.272343] sof-audio-pci 0000:00:1f.3: DSP detected with PCI
class/subclass/prog-if 0x040380
[ 3.272485] sof-audio-pci 0000:00:1f.3: use msi interrupt mode
[ 3.323370] sof-audio-pci 0000:00:1f.3: bound 0000:00:02.0 (ops
i915_audio_component_bind_ops [i915])
[ 3.355159] sof-audio-pci 0000:00:1f.3: hda codecs found, mask 5
[ 3.355161] sof-audio-pci 0000:00:1f.3: using HDA machine driver
skl_hda_dsp_generic now
[ 3.377802] sof-audio-pci 0000:00:1f.3: Direct firmware load for
intel/sof/sof-cnl.ri failed with error -2
[ 3.377805] sof-audio-pci 0000:00:1f.3: error: request firmware
intel/sof/sof-cnl.ri failed err: -2
[ 3.377808] sof-audio-pci 0000:00:1f.3: error: failed to load DSP firmware -2
[ 3.377809] sof-audio-pci 0000:00:1f.3: error: sof_probe_work failed err: -2
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
Uname: Linux 5.4.0-14-generic x86_64
ApportVersion: 2.20.11-0ubuntu20
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: ubuntu:GNOME
Date: Sat Mar 14 18:22:42 2020
InstallationDate: Installed on 2020-03-14 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200309)
PackageArchitecture: all
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/zsh
SourcePackage: alsa-driver
Symptom: audio
Title: PCI/internal sound card not detected
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/25/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: N2QET21W (1.15 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20R1S05A00
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:bvrN2QET21W(1.15):bd02/25/2020:svnLENOVO:pn20R1S05A00:pvrThinkPadX1Carbon7th:rvnLENOVO:rn20R1S05A00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad X1 Carbon 7th
dmi.product.name: 20R1S05A00
dmi.product.sku: LENOVO_MT_20R1_BU_Think_FM_ThinkPad X1 Carbon 7th
dmi.product.version: ThinkPad X1 Carbon 7th
dmi.sys.vendor: LENOVO
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1867479
Title:
PCI/internal sound card not detected. Lenovo X1 Carbon Gen 7 Comet
Lake
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