Public bug reported:
It seems like there is some sort of "disconnect" message that other
operating systems (Android, MacOS) send to all connected bluetooth
devices when the computer/phone's bluetooth system is turned off, which
Ubuntu 20.04.02LTS does not.
When I connect my headphones (Aftershokz Aeropex) to my 20.04.02LTS
Ubuntu system (running on a Thinkpad X1 Carbon 3rd Gen), and then turn
off bluetooth entire from Ubuntu settings, the headphones act as if the
connection to its source device (i.e., the computer) has been lost
unexpectedly, exactly in the same way they would if I'd walked out of
range: they give a periodic "out of range" beep until I power-cycle
them.
If I specifically go into Ubuntu bluetooth settings and disconnect just
the headphones, then the headphones do a quick beep to acknowledge the
disconnection, and do not give "out of range" notifications.
The expected behavior, which my two main other source devices do (a
Macbook, my Android phone), is that when one turns off the bluetooth
system, the source device sends that "disconnect" message to the
headphones (headphones beep once), and there is no "out of range"
beeping afterward.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.8.0-63.71~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-63-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: joe 400296 F.... pulseaudio
/dev/snd/controlC0: joe 400296 F.... pulseaudio
/dev/snd/controlC1: joe 400296 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Aug 9 13:18:56 2021
InstallationDate: Installed on 2021-03-10 (151 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64
(20210209.1)
PackageArchitecture: all
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Aeropex by AfterShokz
Symptom_Type: None of the above
Title: [Aeropex by AfterShokz, playback] Playback problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/11/2018
dmi.bios.release: 1.26
dmi.bios.vendor: LENOVO
dmi.bios.version: N14ET48W (1.26 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20BSCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40705 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.9
dmi.modalias:
dmi:bvnLENOVO:bvrN14ET48W(1.26):bd06/11/2018:br1.26:efr1.9:svnLENOVO:pn20BSCTO1WW:pvrThinkPadX1Carbon3rd:rvnLENOVO:rn20BSCTO1WW:rvrSDK0J40705WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad X1 Carbon 3rd
dmi.product.name: 20BSCTO1WW
dmi.product.sku: LENOVO_MT_20BS_BU_Think_FM_ThinkPad X1 Carbon 3rd
dmi.product.version: ThinkPad X1 Carbon 3rd
dmi.sys.vendor: LENOVO
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1939344
Title:
Bluetooth, when turned off, does not disconnect from connected
headphones
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