Patch sent:
https://lists.ubuntu.com/archives/kernel-team/2022-March/129063.html
** Description changed:
+ [Impact]
+ Commit d215f63d49da ("ALSA: usb-audio: Check available frames for the
+ next packet size") landed in 5.13.0-35 introduced regression to USB
+ audio device.
+
+ It's because this patch introduced the available frame size check, but
+ the conversion forgot to initialize the temporary variable properly.
+
+ A workaround is to modify /etc/pulse/daemon.conf, set the
+ default-sample-rate to 48000, uncomment it by removing the semicolon
+ at the beginning of the line. And restart pulseaudio with:
+ systemctl --user restart pulseaudio.service
+
+ [Fix]
+ * 23939115 ALSA: usb-audio: Fix packet size calculation regression
+ This patch can be cherry-picked into Impish kernel, and it's already in
+ the master-next branch of Jammy tree.
+
+ [Test]
+ Test kernels built with 5.13.0-37 + this patch, can be found in:
+ * Focal-5.13 -
https://people.canonical.com/~phlin/kernel/lp-1966066-usb-audio/focal/
+ * Impish-5.13 -
https://people.canonical.com/~phlin/kernel/lp-1966066-usb-audio/impish/
+
+ Both kernels were tested by affected users and they're working as
+ expected.
+
+ [Where problems could occur]
+ If this patch is incorrect, it might affect USB audio devices.
+
+
+ [Original Bug Report]
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)
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1966066
Title:
audio from external sound card is distorted
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1966066/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
