[Denon AVR-S650H] Playback over Bluetooth is delayed for 2 seconds

[Bogdan]

Hello!

I'm not really sure if is pulseaudio of bluez issue.
Playback (from Gnome Settings sound test and Firefox), volume change, mute/resume is delayed for 2sec or bit more. I've verified this on two Ubuntu 20.04 laptops.

To verify the AV receiver, I've paired MBP 2019 with OS X Catalina 10.15.7 and there are no audible delay.

Here is sink information:

  * index: 16
 name: <bluez_sink.00_05_CD_DF_C4_DD.a2dp_sink>
 driver: <module-bluez5-device.c>
 flags: HARDWARE DECIBEL_VOLUME LATENCY
 state: RUNNING
 suspend cause: (none)
 priority: 9550
 volume: front-left: 46512 / 71% / -8,93 dB, front-right: 46512 / 71% / -8,93 dB
         balance 0,00
 base volume: 65536 / 100% / 0,00 dB
 volume steps: 65537
 muted: no
 current latency: 56,81 ms
 max request: 4 KiB
 max rewind: 0 KiB
 monitor source: 18
 sample spec: s16le 2ch 44100Hz
 channel map: front-left,front-right
              Stereo
 used by: 1
 linked by: 4
 fixed latency: 48,22 ms
 card: 17 <bluez_card.00_05_CD_DF_C4_DD>
 module: 45
 properties:
  bluetooth.protocol = "a2dp_sink"
  device.description = "Denon AVR-S650H"
  device.string = "00:05:CD:DF:C4:DD"
  device.api = "bluez"
  device.class = "sound"
  device.bus = "bluetooth"
  device.form_factor = "speaker"
  bluez.path = "/org/bluez/hci0/dev_00_05_CD_DF_C4_DD"
  bluez.class = "0x240414"
  bluez.alias = "Denon AVR-S650H"
  device.icon_name = "audio-speakers-bluetooth"
 ports:
  speaker-output: Speaker (priority 0, latency offset 0 usec, available: yes)
   properties:

 active port: <speaker-output>

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
Uname: Linux 5.8.5-050805-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.9
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: bogdan 82720 F.... pulseaudio
 /dev/snd/controlC1: bogdan 82720 F.... pulseaudio
 /dev/snd/controlC0: bogdan 82720 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
CurrentDmesg: Error: command ['dmesg'] failed with exit code 1: dmesg: read kernel buffer failed: Operation not permitted
Date: Tue Oct 13 13:46:35 2020
InstallationDate: Installed on 2020-08-05 (68 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Denon AVR-S650H
Symptom_Type: None of the above
Title: [Denon AVR-S650H, playback] Playback problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/02/2020
dmi.bios.release: 2.1
dmi.bios.vendor: HP
dmi.bios.version: S79 Ver. 01.02.01
dmi.board.name: 8730
dmi.board.vendor: HP
dmi.board.version: KBC Version 13.1C.00
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.ec.firmware.release: 19.28
dmi.modalias: dmi:bvnHP:bvrS79Ver.01.02.01:bd07/02/2020:br2.1:efr19.28:svnHP:pnHPProBook455G7:pvr:rvnHP:rn8730:rvrKBCVersion13.1C.00:cvnHP:ct10:cvr:
dmi.product.family: 103C_5336AN HP ProBook
dmi.product.name: HP ProBook 455 G7
dmi.product.sku: 2D242EA#ACB
dmi.sys.vendor: HP

[Sebastien Bacher (seb128)]

Could you try reporting it upstream on https://gitlab.freedesktop.org/pulseaudio/pulseaudio/ ? Ubuntu doesn't have a dedicated maintainer for those components at the moment and it's not likely that will get traction on launchpad