I have a workaorund and a fix for this bug. The bug is due to missing UCM2 folders and config files, which are now available on git hub.
The missing folders are: - /usr/share/alsa/ucm2/chtmax98090/ : it can be retrieved from https://github.com/alsa-project/alsa-ucm-conf/tree/master/ucm2/chtmax98090 - /usr/share/ucm2/codecs/max98090/ : it can be retrived from https://github.com/alsa-project/alsa-ucm- conf/tree/master/ucm2/codecs/max98090 After adding the above two folders and a reboot, the sound works fine. Tested on Ubuntu 20.04.1 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1871306 Title: No sound from internal card chtmax98090 Bay Trail QWAWKS Status in linux package in Ubuntu: Confirmed Bug description: Asus C300 (repurposed chromembook - bios flashed by Mr.Chromebox script) - Kubuntu Focal minimal fresh installation. The sound card is detected: I see it in the Plasma Widget, in pavucontrol, in alsamixer and it's not muted. I tried and add in /usr/share/alsa/ucm/chtmax98090/ the old style use case config files: no success. I tried and unmute speakers left and right in alsamixer: no success. I rapidly tested Ubuntu Mate Focal fresh install: I had exactly the same issue. I'm running on the same rig Debian Bullseye, kernel 5.4: sound card output and input are both working perfectly - I noticed that in Kubuntu alsamixer Kubuntu when I open it I have an entry HDA IntelPCH (the HDMI card), while in Debian I find Pulseaudio. I attach the alsa-info.sh output. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: ubuntu-release-upgrader-core 1:20.04.17 ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27 Uname: Linux 5.4.0-21-generic x86_64 ApportVersion: 2.20.11-0ubuntu24 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: KDE Date: Tue Apr 7 08:55:46 2020 InstallationDate: Installed on 2020-04-04 (2 days ago) InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200401) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader Symptom: dist-upgrade UpgradeStatus: No upgrade log present (probably fresh install) --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu24 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: gabriel3 937 F.... pulseaudio /dev/snd/controlC0: gabriel3 937 F.... pulseaudio CurrentDesktop: KDE DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-04-04 (3 days ago) InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200401) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 8087:07dc Intel Corp. Bus 001 Device 003: ID 13d3:5657 IMC Networks USB2.0 UVC HD Webcam Bus 001 Device 002: ID 062a:4101 MosArt Semiconductor Corp. Wireless Keyboard/Mouse Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: GOOGLE Quawks Package: linux (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-21-generic root=UUID=225cba91-c164-4882-95d4-4f9854a80fe9 ro quiet splash ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27 RelatedPackageVersions: linux-restricted-modules-5.4.0-21-generic N/A linux-backports-modules-5.4.0-21-generic N/A linux-firmware 1.187 Tags: focal Uname: Linux 5.4.0-21-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 03/17/2020 dmi.bios.vendor: coreboot dmi.bios.version: MrChromebox-4.11.2 dmi.board.name: Quawks dmi.board.vendor: GOOGLE dmi.board.version: 1.0 dmi.chassis.type: 9 dmi.chassis.vendor: GOOGLE dmi.modalias: dmi:bvncoreboot:bvrMrChromebox-4.11.2:bd03/17/2020:svnGOOGLE:pnQuawks:pvr1.0:rvnGOOGLE:rnQuawks:rvr1.0:cvnGOOGLE:ct9:cvr: dmi.product.name: Quawks dmi.product.version: 1.0 dmi.sys.vendor: GOOGLE To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1871306/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
