[Bug 1899145] Re: Getting a repeating, white-noise like "tik tok" from speakers

I've been downloading and testing Ubuntu STRs (Short Term Releases) for
this bug.

Has the bug:-
20.10 (initial testing)
20.04 (initial testing)
19.10 (kernel 5.3.0-18)
19.04 (kernel 5.0.0-13)

Does not have the bug:-
18.10 (kernel 4.18.0-10)
18.04 (kernel 4.15.0-20)

--
You received this bug notification because you are subscribed to linux
in Ubuntu.
Matching subscriptions: Bgg, Bmail, Nb
https://bugs.launchpad.net/bugs/1899145

Title:
Getting a repeating, white-noise like "tik tok" from speakers

Status in linux package in Ubuntu:
Confirmed

Bug description:
This bug appears on 20.04 and 20.10

I believe it is a kernel bug.

Currently reporting from Ubuntu 20.10 (beta), having updated packages.
Kernel is x86_64, 5.8.0-21

It can be mitigated by the echo command,namely:
echo -e "\a\a\a"

So I wrote a small shell script to do this:-
#!/usr/bin/env bash
while true
do
date
echo -e "\aShh..."
sleep 5
done

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: linux-image-5.8.0-21-generic 5.8.0-21.22
ProcVersionSignature: Ubuntu 5.8.0-21.22-generic 5.8.13
Uname: Linux 5.8.0-21-generic x86_64
ApportVersion: 2.20.11-0ubuntu49
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: thomas 1239 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 9 10:45:13 2020
InstallationDate: Installed on 2020-10-09 (0 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Beta amd64 (20200930)
IwConfig:
lo no wireless extensions.

enp63s0 no wireless extensions.
MachineType: Hewlett-Packard HP Compaq dc5700 Microtower
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-21-generic root=UUID=9853fe4c-53c3-4680-8919-1e3bd68539d4 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.8.0-21-generic N/A
linux-backports-modules-5.8.0-21-generic N/A
linux-firmware 1.190
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/13/2007
dmi.bios.release: 2.4
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 786E2 v02.04
dmi.board.name: 0A60h
dmi.board.vendor: Hewlett-Packard
dmi.chassis.type: 6
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr786E2v02.04:bd04/13/2007:br2.4:svnHewlett-Packard:pnHPCompaqdc5700Microtower:pvr:rvnHewlett-Packard:rn0A60h:rvr:cvnHewlett-Packard:ct6:cvr:
dmi.product.family: 103C_53307F
dmi.product.name: HP Compaq dc5700 Microtower
dmi.product.sku: GE018ET#ABU
dmi.sys.vendor: Hewlett-Packard

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1899145/+subscriptions