Public bug reported:
My bluetooth performance when connected to an audio device is very poor
on my Lenovo T440s. There are multiple problems when I connect to my
logitech device:
1) It often disconnects unexpectedly. It will connect for 2-5 seconds before
disconnecting. This happens over and over with no messages in dmesg.
2) If I can get it to connect, the audio device is listed in the sound settings
only about 50% of the time. I have to disconnect, restart bluetooth
(\etc\init.d\bluetooth restart) and try again.
3) If I can get it playing, the audio lags by ~10s and is really, really
chopped up. Totally unintelligible.
The things I know which might help:
Computer Type:
Lenovo T440s
Operating system:
Description: Ubuntu 14.04 LTS
Release: 14.04
Codename: trusty
Linux version :
3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 x86_64
x86_64 GNU/Linux
Bluetooth card:
Network controller: Intel Corporation Wireless 7260 (rev 83)
Pulseaudio version:
pulseaudio 4.0 - I don't think it's pulse audio as the daemon won't start:
$ pulseaudio --check
$ pulseaudio -D
E: [pulseaudio] main.c: Daemon startup failed.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: pulseaudio 1:4.0-0ubuntu11
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: seth 2220 F.... pulseaudio
/dev/snd/controlC1: seth 2220 F.... pulseaudio
/dev/snd/pcmC1D0c: seth 2220 F...m pulseaudio
CurrentDesktop: Unity
Date: Sun Jun 22 14:29:41 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-05-21 (32 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
ProcEnviron:
LANGUAGE=en_CA:en
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_CA.UTF-8
SHELL=/bin/bash
SourcePackage: pulseaudio
Symptom: audio
Symptom_Card: (EE)Logitech Adapter
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [(EE)Logitech Adapter, playback] Underruns, dropouts or crackling sound
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/12/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: GJET64WW (2.14 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AQ006HUS
dmi.board.vendor: LENOVO
dmi.board.version: 0B98401 PRO
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrGJET64WW(2.14):bd11/12/2013:svnLENOVO:pn20AQ006HUS:pvrThinkPadT440s:rvnLENOVO:rn20AQ006HUS:rvr0B98401PRO:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20AQ006HUS
dmi.product.version: ThinkPad T440s
dmi.sys.vendor: LENOVO
** Affects: pulseaudio (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bluetooth trusty
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https://bugs.launchpad.net/bugs/1333024
Title:
Bluetooth audio Underruns, dropouts or crackling sound
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