Hi, For about at least two months now, I have found the reason, and also how to solve it. And that is no other than compiling the kernel by yourself, while applying a change in the configuration.
See: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=976791 These settings need to be enabled before build (the first one makes the second one visible): CONFIG_SND_SOC_INTEL_USER_FRIENDLY_LONG_NAMES=y CONFIG_SND_SOC_INTEL_SOUNDWIRE_SOF_MACH=m Here follows is how to do it whith the NCurses interface that you get with the kernel source for Ubuntu: Device Drivers ---> <M> Sound card support ---> <M> Advanced Linux Sound Architecture ---> <M> ALSA for SoC audio support ---> -*- Intel Machine drivers ---> [*] Use more user friendly long card names <M> SoundWire generic machine driver For now I won't go into more detail, but this is wat needs to be done and what Canonical/Ubuntu should have done by themselves! Ubuntu is the only distro which I know that has this setting still disabled. SoundWire works out of the box with Arch Linux, with Fedora, with Debian, but not with Ubuntu (why doing these things different from Debian?). So please Canonical/Ubuntu correct it! Thanks! ** Bug watch added: Debian Bug tracker #976791 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=976791 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1925730 Title: Dell XPS 17 (Ubuntu 21.04) - No sound AT ALL upon fresh installation Status in alsa-driver package in Ubuntu: New Bug description: New laptop - Dell XPS 17, bought in 2020. Upon installation of Ubuntu 21.04 sound does not work at all. System settings only show one audio output - "Dummy output". Audio input does not have even that, just an empty drop-down list. Issue can be fixed if we load a custom sound driver as described here: https://blog.fts.scot/2020/07/04/dell-xps-2020-how-to-get-audio- working-on-linux/ That poses a security risk however and according to the author of the article is not necessary since mainline Kernel release 5.11 now has required device headers included. ... lspci output: user@MYPC:~$ lspci -v | grep -i -A 10 audio 00:1f.3 Multimedia audio controller: Intel Corporation Comet Lake PCH cAVS Subsystem: Dell Comet Lake PCH cAVS Flags: bus master, fast devsel, latency 64, IRQ 229, IOMMU group 16 Memory at 609b218000 (64-bit, non-prefetchable) [size=16K] Memory at 609b100000 (64-bit, non-prefetchable) [size=1M] Capabilities: <access denied> Kernel driver in use: sof-audio-pci Kernel modules: snd_hda_intel, snd_sof_pci -- 01:00.1 Audio device: NVIDIA Corporation TU106 High Definition Audio Controller (rev a1) Subsystem: Dell TU106 High Definition Audio Controller Flags: bus master, fast devsel, latency 0, IRQ 17, IOMMU group 1 Memory at 73000000 (32-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: snd_hda_intel Kernel modules: snd_hda_intel Looked around for soundwire drivers, found this: user@MYPC:~$ lsmod | grep soundwire soundwire_intel 40960 2 snd_sof_intel_hda_common,snd_intel_dspcfg soundwire_generic_allocation 16384 1 soundwire_intel soundwire_cadence 32768 1 soundwire_intel soundwire_bus 77824 7 regmap_sdw,soundwire_intel,snd_soc_rt715,soundwire_generic_allocation,soundwire_cadence,snd_soc_rt711,snd_soc_rt1308_sdw snd_soc_core 294912 8 soundwire_intel,snd_sof,snd_sof_intel_hda_common,snd_soc_rt715,snd_soc_hdac_hda,snd_soc_rt711,snd_soc_dmic,snd_soc_rt1308_sdw snd_pcm 118784 14 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,soundwire_intel,snd_sof,snd_sof_intel_hda_common,snd_sof_intel_ipc,snd_soc_rt715,snd_compress,snd_soc_core,snd_soc_rt711,snd_soc_rt1308_sdw,snd_hda_core,snd_pcm_dmaengine Maybe using the soundwire_intel driver would fix the problem? Need to keep digging. Will post an update if I have any progress. ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: alsa-base 1.0.25+dfsg-0ubuntu7 ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12 Uname: Linux 5.11.0-16-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu65 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: iamarkadyt 1593 F.... pulseaudio CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Fri Apr 23 00:18:15 2021 InstallationDate: Installed on 2021-04-23 (0 days ago) InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420) PackageArchitecture: all ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia failed Symptom_Card: TU106 High Definition Audio Controller - HDA NVidia Symptom_DevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: iamarkadyt 1593 F.... pulseaudio Symptom_Type: No sound at all Title: [HDA-Intel - HDA NVidia, playback] No sound at all UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/03/2020 dmi.bios.release: 1.4 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.4.0 dmi.board.name: 0YK6XT dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.4.0:bd09/03/2020:br1.4:svnDellInc.:pnXPS179700:pvr:rvnDellInc.:rn0YK6XT:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: XPS dmi.product.name: XPS 17 9700 dmi.product.sku: 098F dmi.sys.vendor: Dell Inc. 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