** Description changed:
Scenario:
=
1. A mainboard (Asus Prime 570-Pro) with onboard audio:
c:00.4 Audio device [0403]: Advanced Micro Devices, Inc. [AMD]
Starship/Matisse HD Audio Controller [1022:1487]
- Subsystem: ASUSTeK Computer Inc. Starship/Matisse HD Audio Controller
[1043:8733]
+ Subsystem: ASUSTeK Computer Inc. Starship/Matisse HD Audio Controller
[1043:8733]
2. The device is configured as Analog Stereo Duplex in pavucontrol
3. A microphone is plugged into the pink input jack
4. The VU-meter in the pavucontrol "Input devices" tab displays plausible
levels for the mic
5. The mic works in most applications (mumble, teams)
Steps to reproduce:
===
1. Start audacity
Expected behaviour:
===
The microphone should continue to work, and Audacity should be able to
use it
Observed behaviour:
===
As soon as audacity starts, the VU-meter in pavucontrol is updated only
about once a second, and the displayed levels have no discernible
- relation to the levels of moinse I make as displayed e.g. for the USB
- Mic in my webcam. If I start to record using the microphone in Audacity,
+ relation to the levels of noise I make as displayed e.g. for the USB Mic
+ in my webcam. If I start to record using the microphone in Audacity,
audacity records with a speed of maybe 0.25 recorded seconds per second
of wall clock time, recording only weird sounds, if anything at all. The
microphone stays unusable for all applications until I restart the
computer.
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: audacity 2.4.2~dfsg0-3
ProcVersionSignature: Ubuntu 5.8.0-20.21-lowlatency 5.8.10
Uname: Linux 5.8.0-20-lowlatency x86_64
ApportVersion: 2.20.11-0ubuntu48
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sat Oct 3 13:21:59 2020
InstallationDate: Installed on 2020-05-28 (127 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: audacity
UpgradeStatus: Upgraded to groovy on 2020-10-03 (0 days ago)
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https://bugs.launchpad.net/bugs/1898352
Title:
audacity kills rear microphone input on Starship/Matisse HD as soon as
it starts
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