The behavior is different with the test kernel. please find the screenshot and the alsa-info below.
** Attachment added: "Screenshot from 2019-10-20 18-18-34.png" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1846148/+attachment/5298552/+files/Screenshot%20from%202019-10-20%2018-18-34.png -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1846148 Title: Realtek ALC256M with DTS Audio Processing internal microphone doesn't work on Redmi Book 14 2019 Status in alsa-driver package in Ubuntu: Confirmed Bug description: Sound works okay but the internal mic doesn't work. When I plug in headset, the mic on headset also doens't work. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 5.0.0-29.31~18.04.1-generic 5.0.21 Uname: Linux 5.0.0-29-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.9-0ubuntu7.7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: lilian 1689 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Tue Oct 1 12:27:10 2019 InstallationDate: Installed on 2019-09-21 (9 days ago) InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Title: PCI/internal sound card not detected UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/19/2019 dmi.bios.vendor: TIMI dmi.bios.version: RMRCM400P0100 dmi.board.name: TM1901 dmi.board.vendor: TIMI dmi.chassis.type: 10 dmi.chassis.vendor: TIMI dmi.modalias: dmi:bvnTIMI:bvrRMRCM400P0100:bd08/19/2019:svnTIMI:pnRedmiBook14:pvr:rvnTIMI:rnTM1901:rvr:cvnTIMI:ct10:cvr: dmi.product.family: Mi Laptop dmi.product.name: RedmiBook 14 dmi.product.sku: TM1901-24822 dmi.sys.vendor: TIMI To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1846148/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
