Hello folks, Can you give the following test kernel a try, which contains a possible fix: https://github.com/torvalds/linux/commit/23939115be181bc5dbc33aa8471adcdbffa28910
Steps: 1. Remove the workaround that you made and make sure you have this issue in Focal / Impish 5.13.0-37 2. Download kernel deb files here based on your current distro, put them into a new directory: focal - https://people.canonical.com/~phlin/kernel/lp-1966066-usb-audio/focal/ impish - https://people.canonical.com/~phlin/kernel/lp-1966066-usb-audio/impish/ 2. Roll back to 5.13.0-35 by selecting the corresponding entry in GRUB 3. Remove the 5.13.0-37 kernel, otherwise it will complain about a version conflict: sudo apt remove linux-image-5.13.0-37-generic linux-image-unsigned-5.13.0-37-generic 4. Install those deb files in Step 2, with command: sudo dpkg -i linux-*5.13*.deb 5. Reboot to this test kernel and check the version number with `uname -vr`, it should be something like: 5.13.0-37-generic #42+lp1966066 SMP Tue Mar 29 02:54:38 UTC 2022 6. Test your audio and see if it helps After your test, you can undo this change by: A. Rolling back to 5.13.0-35 again B. sudo apt remove linux-image-unsigned-5.13.0-37-generic C. sudo apt install linux-image-5.13.0-37-generic Thanks! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-5.13 in Ubuntu. https://bugs.launchpad.net/bugs/1966066 Title: audio from external sound card is distorted Status in linux-signed-hwe-5.13 package in Ubuntu: Confirmed Bug description: The sound card is a Focusrite Scarlett 2i2. The sound is distorted everywhere. Sound via HDMI works. Seen others having the same problem: (Edit because of previously wrong link here) https://askubuntu.com/questions/1398614/upgrading-to-5-13-0-37-generic-breaks-audio-with-external-audio-card ubuntu release: Ubuntu 20.04.4 LTS package name involved in bug: linux-image-5.13.0-37-generic ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.13.0-37-generic 5.13.0-37.42~20.04.1 ProcVersionSignature: Ubuntu 5.13.0-35.40~20.04.1-generic 5.13.19 Uname: Linux 5.13.0-35-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27.21 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Wed Mar 23 12:56:02 2022 InstallationDate: Installed on 2020-12-18 (459 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) SourcePackage: linux-signed-hwe-5.13 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.13/+bug/1966066/+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
