Here is the dmesg output as well as some output from aplay and pactl after installing the kernel from:
https://people.canonical.com/~mschiu77/lp1915117/v2/ $ uname -a Linux 5.10.0-1035-oem #36 SMP Mon Jun 28 16:41:34 CST 2021 x86_64 x86_64 x86_64 GNU/Linux I can now see the audio card with aplay -l, but it still shows "Dummy Output" in the Sound Settings and no sound can be heard when trying to play a sound with aplay. ** Attachment added: "alsa-pulseaudio-info.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1915117/+attachment/5507875/+files/alsa-pulseaudio-info.log -- 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/1915117 Title: [Regression] Audio card [8086:9d71] not detected after upgrade from linux 5.4 to 5.8 Status in linux package in Ubuntu: Confirmed Bug description: Ubuntu version: 20.10 (updated from 20.04) Kernel: 5.8.0-41-generic #46-Ubuntu Manufacturer: Acer Product Name: Swift SF314-54 BIOS Revision: 1.11 Audio card: Realtek High Definition Audio Multimedia audio controller [0401]: Intel Corporation Sunrise Point-LP HD Audio [8086:9d71] (rev 21) Summary ======= After upgrading from linux kernel 5.4 to 5.8, there is no more sound card available. However, if I select kernel 5.4 in GRUB, the sound card is available. Steps to reproduce ================== 1. Install 20.04 or 20.10 with a kenel 5.4 2. Check that sound output works as excepted (Settings > Sound > Output > Test) 3. Check that `alsa-info` command returns information 4. Upgrade kernel to 5.8 Expected results ================ Sound output still works. Actual results ============== 2. Sound card is available, and sound can be output to the internal speakers. 4. No more sound card detected (Sound Settings display "Dummy Output" in the list of output devices). ProblemType: Bug DistroRelease: Ubuntu 20.10 Package: linux-image-5.8.0-41-generic 5.8.0-41.46 ProcVersionSignature: Ubuntu 5.8.0-41.46-generic 5.8.18 Uname: Linux 5.8.0-41-generic x86_64 ApportVersion: 2.20.11-0ubuntu50.5 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Tue Feb 9 14:42:00 2021 InstallationDate: Installed on 2019-01-20 (751 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3) MachineType: Acer Swift SF314-54 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.8.0-41-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash mem_sleep_default=deep vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.8.0-41-generic N/A linux-backports-modules-5.8.0-41-generic N/A linux-firmware 1.190.3 SourcePackage: linux UpgradeStatus: Upgraded to groovy on 2021-02-03 (5 days ago) dmi.bios.date: 11/21/2018 dmi.bios.release: 1.11 dmi.bios.vendor: Insyde Corp. dmi.bios.version: V1.11 dmi.board.name: Strongbow_KL dmi.board.vendor: KBL dmi.board.version: V1.11 dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V1.11 dmi.ec.firmware.release: 1.6 dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.11:bd11/21/2018:br1.11:efr1.6:svnAcer:pnSwiftSF314-54:pvrV1.11:rvnKBL:rnStrongbow_KL:rvrV1.11:cvnAcer:ct10:cvrV1.11: dmi.product.family: Swift 3 dmi.product.name: Swift SF314-54 dmi.product.sku: 0000000000000000 dmi.product.version: V1.11 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1915117/+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
