Microphone doesn't work with Sony WH-CH700N bluetooth headphone

[Richard Somlói]

I can choose the headphone as an input device, but it doesn't work.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: bluez 5.53-0ubuntu3
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu26
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Tue Apr 14 08:41:32 2020
InstallationDate: Installed on 2020-02-26 (47 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200225.4)
InterestingModules: rfcomm bnep btusb bluetooth
MachineType: To be filled by O.E.M. To be filled by O.E.M.
ProcEnviron:
 TERM=screen-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=hu_HU.UTF-8
 SHELL=/usr/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-21-generic root=UUID=1dc32c86-d135-46fa-a68a-1cd7fcf4f31e ro quiet splash vt.handoff=7
SourcePackage: bluez
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/26/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2603
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: M5A97 R2.0
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2603:bd06/26/2015:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnM5A97R2.0:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: To be filled by O.E.M.
dmi.product.sku: SKU
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: To be filled by O.E.M.
hciconfig:
 hci0: Type: Primary Bus: USB
  BD Address: 00:15:83:32:FA:A8 ACL MTU: 510:8 SCO MTU: 48:10
  UP RUNNING
  RX bytes:156081 acl:67 sco:2629 events:2771 errors:0
  TX bytes:1351383 acl:2903 sco:2625 commands:88 errors:0
rfkill:
 0: hci0: Bluetooth
  Soft blocked: no
  Hard blocked: no

[Sebastien Bacher (seb128)]

Thank you for your bug report. Could you add your 'journalctl -b 0' log after getting the issue?
does it work in other applications?

[Richard Somlói (ricsipontaz)]

Thanks your the quick reply. I've attached the requested log. Unfortunately, it doesn't work anywhere.

[Sebastien Bacher (seb128)]

Thanks, does moving .config/pulse away and restarting the session helps? Does selecting the device in pavucontrol makes a difference?

The log has that message, unsure if that has to do with the issue though

 dbus-daemon[1247]: [system] Rejected send message, 0 matched rules; type="method_return", sender=":1.167" (uid=1000 pid=3104 comm="/usr/bin/pulseaudio --daemonize=no " label="unconfined") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.3" (uid=0 pid=1243 comm="/usr/lib/bluetooth/bluetoothd " label="unconfined")

[Richard Somlói (ricsipontaz)]

I've removed the config file and restarted the session, but no luck. :(

There's nothing under input devices in pavucontrol, see attached screenshot.

[Richard Somlói (ricsipontaz)]

Here's a screenshot with output devices:

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

The screenshot in comment #1 seems to show the headset is in A2DP mode. This means, per the original Bluetooth specification, it can only output and not input.

To enable input (microphone), you need to change the profile from A2DP to HSP/HFP. Although that makes the output quality low (bug 1838151), it's the only option that supports microphones at the moment.

Please change the profile for the headset to HSP/HFP and then retest the microphone.

[Daniel van Vugt (vanvugt)]

If the above instructions still don't work then this would become a duplicate of bug 1900135.