Bluetooth headphones not detected properly

[Bill Gradwohl]

On a fresh system boot, stereo Bluetooth headphones with a microphone that identify as WH-CH710N connect but provide no sound until Settings is used to pick the only microphone option, the headphones, whereupon sound immediately works.

Thereafter, doing a sound Test reveals the headphones are considered mono, not stereo.

Sound works, but periodically the Bluetooth connection halts the browser that's playing the sound and in about 10 seconds, Bluetooth disconnects then reconnects a short time later but with the original sound problem.

The issue is with the Bluetooth detection. The symptom is no sound.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: alsa-base 1.0.25+dfsg-0ubuntu7
ProcVersionSignature: Ubuntu 5.15.0-86.96-generic 5.15.122
Uname: Linux 5.15.0-86-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: bill 1876 F.... pulseaudio
CasperMD5CheckResult: unknown
CurrentDesktop: GNOME
Date: Sat Oct 14 08:38:00 2023
InstallationDate: Installed on 2019-11-18 (1425 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Title: Bluetooth sound card not detected
UpgradeStatus: Upgraded to jammy on 2022-11-01 (346 days ago)
dmi.bios.date: 09/21/2018
dmi.bios.release: 5.13
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0805
dmi.board.asset.tag: Default string
dmi.board.name: ROG STRIX Z390-I GAMING
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0805:bd09/21/2018:br5.13:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnROGSTRIXZ390-IGAMING:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:skuASUS_MB_CNL:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: ASUS_MB_CNL
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer