[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

This bug is closed. Please log a new bug by running:

  ubuntu-bug pulseaudio

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Justin Jia]

I still have this problem, Anybody running the latest pulseaudio on
Raspberry Pi or CM3? I'm using pulseaudio 12.2 with bluez 5.50.

After I connected to a Bluetooth speaker. When play something, it's
really choppy and skipping a lot. The debug message shows:

D: [bluetooth] module-bluez5-device.c: Skipping 43083 us (= 7600 bytes)
in audio stream

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Bug Watch Updater]

Launchpad has imported 38 comments from the remote bug at
https://bugs.freedesktop.org/show_bug.cgi?id=58746.

If you reply to an imported comment from within Launchpad, your comment
will be sent to the remote bug automatically. Read more about
Launchpad's inter-bugtracker facilities at
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On 2012-12-25T13:10:22+00:00 farbing wrote:

I'm using a bluetooth headset with pulseaudio. Whenever the connection
temporarily drops (e.g. by moving too far from the bt device), I get the
message in the syslog:

[bluetooth] module-bluetooth-device.c: Skipping 24275 us (= 4280 bytes)
in audio stream

and the audio lags behind after that. A workaround is to suspend and
resume the sink using "pactl suspend-sink 1 && pactl suspend-sink 0",
after which the audio is in sync again.

Using the same headset on Windows doesn't show the same behavior.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/405294/comments/109


On 2016-02-13T23:32:25+00:00 Z-mike-y wrote:

Bumping this due to the fact that this bug is still very much present in
5, 6, 7, 8 and renders the act of using a bluetooth headset on most
linux operating systems using pulseaudio utterly useless. The slightest
blip throws the whole audio out of sync with the video. I noticed this
when trying to watch a movie from a 6ft distance away (sill in range)
but occasionally the signal would blip and cause said problem. Evidence
in the logs:

Three of many lines:

Feb 13 17:25:49 saturn.net.overtmind.com pulseaudio[30599]: [bluetooth] 
module-bluez5-device.c: Skipping 5124656 us (= 903988 bytes) in audio stream
Feb 13 17:25:49 saturn.net.overtmind.com pulseaudio[30599]: [bluetooth] mod 
ule-bluez5-device.c: Skipping 220060 us (= 38816 bytes) in audio stream
Feb 13 17:25:49 saturn.net.overtmind.com pulseaudio[30599]: [bluetooth] 
module-bluez5-device.c: Skipping 346147 us (= 61060 bytes) in audio stream

Packages tested in Fedora 23:

rawhide:

bluez-5.37-2.fc24.x86_64
pulseaudio-8.0-3.fc24.x86_64

and also tried initially with:

bluez-5.36-1.fc23.x86_64
pulseaudio-7.1-1.fc23.x86_64

The rest of my findings are here, where someone else has also mentioned
seeing this on Gentoo with PA 5,6 - I have tested 7 and 8:

https://www.reddit.com/r/linuxquestions/comments/45n710/pulseaudio_bluetooth_degraded_signal_out_of_sync/

Reply at:
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/405294/comments/126


On 2016-02-14T09:53:05+00:00 Raymond wrote:

If you want audio sync with video after audio transmission is broken,
you need the application to skip some audio and restart audio playback

Reply at:
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/405294/comments/127


On 2016-02-14T10:21:54+00:00 Z-mike-y wrote:

Shouldn't the buffer reset after detecting a skip event?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/405294/comments/128


On 2016-05-04T01:37:04+00:00 Sb wrote:

(In reply to xenith from comment #3)
> Shouldn't the buffer reset after detecting a skip event?

This would seem to be the most logical thing. The way it is now, even
stopping and re-starting the audio stream doesn't fix the latency issue
if there has ever been a brief blip in the current Bluetooth connection.
Quite a showstopper for watching video with bluetooth
speakers/headphones.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/405294/comments/130


On 2016-05-08T15:46:53+00:00 Arun Raghavan wrote:

I've tried to reproduce this behaviour in the past, but it doesn't
always happen this way (but I have seen the delays turn up on drops at
times). If someone has a patch that definitely works (or a way to repro
that is 100% reliable), I can try to look at this.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/405294/comments/131


On 2016-05-10T15:58:47+00:00 Sb wrote:

(In reply to Arun Raghavan from comment #5)
> I've tried to reproduce this behaviour in the past, but it doesn't always
> happen this way (but I have seen the delays turn up on drops at times). If
> someone has a patch that definitely works (or a way to repro that is 100%
> reliable), I can try to look at this.

I have about 6 different cheap Chinese bluetooth speakers, and they all
exhibit this behavior. They all use the A2DP protocol, are you possibly
seeing different behavior with HSP/HFP?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/405294/comments/132

[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

Probably, but not definitely. I've nominated xenial for a fix in case we
can.

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Yura Pakhuchiy]

Is it possible to backport fix which recently landed for bionic to
xenial?

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Launchpad Bug Tracker]

This bug was fixed in the package pulseaudio - 1:11.1-1ubuntu7.1

---
pulseaudio (1:11.1-1ubuntu7.1) bionic; urgency=medium

  * 0804-bluez5-device-Rewrite-of-thread-function-reduce-send.patch,
0805-bluez5-device-Fix-memory-leak-in-sco_process_render.patch:
- Reduce latency over bluetooth, using A2DP, when the connection drops
  temporarily (LP: #405294).

 -- Alberto Milone   Mon, 21 May 2018
16:41:41 +0200

** Changed in: pulseaudio (Ubuntu Bionic)
   Status: Fix Committed => Fix Released

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Alberto Milone]

The packages in bionic-proposed work well here, on my Lenovo Yoga Pro 2
with my Yamaha SRT-1000 soundbar.

Sound quality is really good using A2DP, and the audio never goes out of
sync when I watch videos, and it doesn't break up when I listen to
music.

I'm also attaching the output of "apt-cache policy '*pulse*'".

** Attachment added: "installed-packages"
   
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/405294/+attachment/5144156/+files/installed-packages

** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic

** Tags removed: verification-needed

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
  audio stream"]

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Brian Murray]

Hello volkris, or anyone else affected,

Accepted pulseaudio into bionic-proposed. The package will build now and
be available at
https://launchpad.net/ubuntu/+source/pulseaudio/1:11.1-1ubuntu7.1 in a
few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-bionic to verification-done-bionic. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-bionic. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: pulseaudio (Ubuntu Bionic)
   Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-bionic

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Alberto Milone]

@Łukasz: I have updated the regression potential part with more details.

As a side note, I've been running the code for days, using my Yamaha
SRT-1000 (a bluetooth soundbar) with my laptop, and I have yet to see
the audio go out of sync, or crackle (which were quite frequent before
the changes). This makes bluetooth audio pretty much on par with MacOS.

** Description changed:

  SRU Request:
  
  [Impact]
  When the connection drops temporarily, using A2DP, a noticeable latency is 
introduced, and the audio goes out of sync.
  
  [Test Case]
  1) Enable the -proposed repository, and install the new pulseaudio
  
  2) Restart your computer, connect it to a bluetooth device (e.g. a
  headset or a speaker), play one or more videos either locally or online,
  and see if you can still reproduce the problem.
  
  [Regression Potential]
  Low, as the changes are upstream, and, if anything, it should also fix a 
memory leak.
+ 
+ Furthermore, the changes only affect the bluez5-device module, in
+ pulseaudio, and they make the buffer updating logic more conscious of
+ how things can change when the connection drops. This is unlikely to
+ affect anything else in pulseaudio.
  
  
  As I upgraded to the Karmic alpha, bluetooth audio (via a2dp) stopped working 
properly. It was working fine in Jaunty.
  
  My headphones are detected and configured by pulse, but the audio skips
  as if it's spending half of each second paused. Music is buffered so
  that after I click stop on rhythmbox (or whatever--it happens with
  whatever player I use) the audio continues until it's caught up.
  
  syslog is full of the following lines:
  Jul 27 08:55:45 carlin1 pulseaudio[3218]: alsa-source.c: Increasing minimal 
latency to 1.00 ms
  Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c: Skipping 
15128 us (= 2668 bytes) in audio stream
  Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c: Skipping 
36586 us (= 6452 bytes) in audio stream
  Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c: Skipping 
35593 us (= 6276 bytes) in audio stream
  Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c: Skipping 
36597 us (= 6452 bytes) in audio stream
  Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c: Skipping 
32601 us (= 5748 bytes) in audio stream
  Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c: Skipping 
32589 us (= 5748 bytes) in audio stream
  
  This is with
  bluez 4.45-0ubuntu4
  pulseaudio1:0.9.15-4ubuntu2 0
  
  pulseaudio version 1:0.9.16~test2-0ubuntu1~ppa3 from ubuntu-audio-dev
  didn't help.

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Łukasz Zemczak]

I'm generally fine with getting this approved, but before that I'd like
some more regression potential analysis to be done and included in the
Regression Potential field. The first patch added to fix the issue is
quite big and includes a rewrite of thread_func() in there - and any
rewrite with so much code modified carries some regression potential.
What we'd like to know is which parts of pulseaudio's functionality
could regress in worst case scenarios, at which parts testers should
look to expect issues.

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Launchpad Bug Tracker]

This bug was fixed in the package pulseaudio - 1:11.1-1ubuntu8

---
pulseaudio (1:11.1-1ubuntu8) cosmic; urgency=medium

  * 0804-bluez5-device-Rewrite-of-thread-function-reduce-send.patch,
0805-bluez5-device-Fix-memory-leak-in-sco_process_render.patch:
- Reduce latency over bluetooth, using A2DP, when the connection drops
  temporarily (LP: #405294).

 -- Alberto Milone   Mon, 21 May 2018
16:41:41 +0200

** Changed in: pulseaudio (Ubuntu)
   Status: Fix Committed => Fix Released

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

pulseaudio (1:11.1-1ubuntu8) cosmic; urgency=medium

  * 0804-bluez5-device-Rewrite-of-thread-function-reduce-send.patch,
0805-bluez5-device-Fix-memory-leak-in-sco_process_render.patch:
- Reduce latency over bluetooth, using A2DP, when the connection drops
  temporarily (LP: #405294).

 -- Alberto Milone   Mon, 21 May 2018
16:41:41 +0200

** Changed in: pulseaudio (Ubuntu)
   Status: In Progress => Fix Committed

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

pulseaudio (1:11.1-1ubuntu8) cosmic; urgency=medium

  * 0804-bluez5-device-Rewrite-of-thread-function-reduce-send.patch,
0805-bluez5-device-Fix-memory-leak-in-sco_process_render.patch:
- Reduce latency over bluetooth, using A2DP, when the connection drops
  temporarily (LP: #405294).

 -- Alberto Milone   Mon, 21 May 2018
16:41:41 +0200

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Title:
  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
  audio stream"]

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Alberto Milone]

Please approve pulseaudio 11.1-1ubuntu7.1 in bionic-proposed.

** Description changed:

- As I upgraded to the Karmic alpha, bluetooth audio (via a2dp) stopped
- working properly. It was working fine in Jaunty.
+ SRU Request:
+ 
+ [Impact]
+ When the connection drops temporarily, using A2DP, a noticeable latency is 
introduced, and the audio goes out of sync.
+ 
+ [Test Case]
+ 1) Enable the -proposed repository, and install the new pulseaudio
+ 
+ 2) Restart your computer, connect it to a bluetooth device (e.g. a
+ headset or a speaker), play one or more videos either locally or online,
+ and see if you can still reproduce the problem.
+ 
+ [Regression Potential]
+ Low, as the changes are upstream, and, if anything, it should also fix a 
memory leak.
+ 
+ 
+ As I upgraded to the Karmic alpha, bluetooth audio (via a2dp) stopped working 
properly. It was working fine in Jaunty.
  
  My headphones are detected and configured by pulse, but the audio skips
  as if it's spending half of each second paused. Music is buffered so
  that after I click stop on rhythmbox (or whatever--it happens with
  whatever player I use) the audio continues until it's caught up.
  
  syslog is full of the following lines:
  Jul 27 08:55:45 carlin1 pulseaudio[3218]: alsa-source.c: Increasing minimal 
latency to 1.00 ms
  Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c: Skipping 
15128 us (= 2668 bytes) in audio stream
  Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c: Skipping 
36586 us (= 6452 bytes) in audio stream
  Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c: Skipping 
35593 us (= 6276 bytes) in audio stream
  Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c: Skipping 
36597 us (= 6452 bytes) in audio stream
  Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c: Skipping 
32601 us (= 5748 bytes) in audio stream
  Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c: Skipping 
32589 us (= 5748 bytes) in audio stream
  
  This is with
  bluez 4.45-0ubuntu4
  pulseaudio1:0.9.15-4ubuntu2 0
  
  pulseaudio version 1:0.9.16~test2-0ubuntu1~ppa3 from ubuntu-audio-dev
  didn't help.

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Alberto Milone]

** Changed in: pulseaudio (Ubuntu Bionic)
   Status: Triaged => In Progress

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Alberto Milone]

** Changed in: pulseaudio (Ubuntu)
 Assignee: (unassigned) => Alberto Milone (albertomilone)

** Also affects: pulseaudio (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Changed in: pulseaudio (Ubuntu)
   Status: Triaged => In Progress

** Changed in: pulseaudio (Ubuntu Bionic)
   Status: New => Triaged

** Changed in: pulseaudio (Ubuntu Bionic)
   Importance: Undecided => High

** Changed in: pulseaudio (Ubuntu Bionic)
 Assignee: (unassigned) => Alberto Milone (albertomilone)

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Bug Watch Updater]

** Changed in: pulseaudio
   Status: Confirmed => Fix Released

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Bug Watch Updater]

** Changed in: pulseaudio
   Status: Unknown => Confirmed

** Changed in: pulseaudio
   Importance: Unknown => Medium

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

Thanks for the link!

I feel it is now appropriate to reopen this bug to see through the release of 
the patch for:
  https://bugs.freedesktop.org/show_bug.cgi?id=58746

But also still;

* Users of wifi driver 'wl' from package 'bcmwl-kernel-source' such as
Saleh, please subscribe to bug 1518408.

* Users of wifi driver 'ath9k' please subscribe to bug 1746164.

** Changed in: pulseaudio
   Importance: Medium => Unknown

** Changed in: pulseaudio
   Status: Confirmed => Unknown

** Changed in: pulseaudio
 Remote watch: freedesktop.org Bugzilla #88827 => freedesktop.org Bugzilla 
#58746

** Changed in: pulseaudio (Ubuntu)
   Status: Invalid => Triaged

** No longer affects: bluez (Ubuntu)

** No longer affects: linux (Ubuntu)

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Title:
  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Evgeniy Polyakov]

This patch seems to fix the issue, at least on one of yet another my
system (fedora for that matter) with rather rare skips


https://bugs.freedesktop.org/show_bug.cgi?id=58746#c27

** Bug watch added: freedesktop.org Bugzilla #58746
   https://bugs.freedesktop.org/show_bug.cgi?id=58746

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[JoaoH]

@Evgeniy Polyakov

Live CD/USB almost always work perfectly, that is not a confirmation
that the issue does not exist. It is not a Distro problem per say. If
you installed Fedora, the second time you tried to use the audio device,
it would fail/skip etc. I do not know why, but I have been fooled many
times by a "working" live CD/USB only to find out that once installed,
it does not.

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Evgeniy Polyakov]

@vanvugt I've compiled and installed the latest pulseaudio with and without 
ubuntu patches, and this does not help. Checked with fedora live cd and things 
work without any problems.
Changing @audio group to have rt permissions as well as tuning pulseaudio in 
its config (setting nice, rtprio, large memory limits and so on) does not seem 
to change anything.

Getting, that I currently have the pre-latest (5.48-0ubuntu3) bluez and
pulseaudio, and problem persists, can it be related to something else?

desktop is problem in this case is a little bit different, it does not
skip terribly, but once per 2-5 seconds, while laptop mentioned
yesterday is indeed in trouble.

ubuntu-bug refuses to work if there is third-party software installed.

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

Please log a new bug using this command so that we may examine your
system in detail:

  ubuntu-bug bluez

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Evgeniy Polyakov]

Hi

I have this problem both on 16.04 and 17.10, and it is NOT related to
wifi, since on my 16.04 desktop there is no wifi module at all. I tried
installing 5.49 blues on 16.04 host, it does not seem to help, but I can
not be 100% sure since I did not check whether exact new bt service was
operating.

17.10 contrary is macbook laptop with BCM4360 adapter and wl driver, but
disabling wifi and removing the module does not help.

Rebooting 17.10 with new audio.conf/hcid.conf and using blueman to pair
seems to help, but that can be a coincidence.

What steps you want me to make to provide more debug information?

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

Saleh, please also mention which version of Ubuntu you are using.

** Tags added: a2dp-skip

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

Thanks Saleh. That means your problem is a bug in the bcmwl driver.
bcmwl seems to not implement bluetooth coexistence at all, so its own
wifi signal might be destroying its bluetooth quality. In fact I just
found someone else has already logged a bug for you...

EVERYONE:

Please find out your wifi/bluetooth kernel driver names using the 'lspci
-k' command. Then:

* Users of driver 'wl' from package 'bcmwl-kernel-source' such as Saleh,
please subscribe to bug 1518408 instead of this one.

* Users of driver 'ath9k' please subscribe to bug 1746164 instead of
this one.

* Users of all other drivers, please log your own new bugs using command:
ubuntu-bug pulseaudio
or  ubuntu-bug bluez
and also attach output of 'lspci -k' to your new bug.

I am closing this bug since it's become an unresolvable mess. We will
resolve your individual issues as separate bugs.


** Changed in: bluez (Ubuntu)
   Status: Incomplete => Invalid

** Changed in: linux (Ubuntu)
   Status: Incomplete => Invalid

** Changed in: pulseaudio (Ubuntu)
   Status: Incomplete => Invalid

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Saleh]

Bluetooth works fine when wifi is disabled!

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

OK, wifi doesn't work so it's a temporary test. Please still test
bluetooth audio while wifi is gone. Is this bug fixed for you?

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Saleh]

I uninstalled 'bcmwl-kernel-source', and wifi stopped working after
rebooting!


$ lspci -k
00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller 
(rev 09)
Subsystem: Toshiba America Info Systems 3rd Gen Core processor DRAM 
Controller
Kernel driver in use: ivb_uncore
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor 
Graphics Controller (rev 09)
Subsystem: Toshiba America Info Systems 3rd Gen Core processor Graphics 
Controller
Kernel driver in use: i915
Kernel modules: i915
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family 
USB xHCI Host Controller (rev 04)
Subsystem: Toshiba America Info Systems 7 Series/C210 Series Chipset 
Family USB xHCI Host Controller
Kernel driver in use: xhci_hcd
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series 
Chipset Family MEI Controller #1 (rev 04)
Subsystem: Toshiba America Info Systems 7 Series/C210 Series Chipset 
Family MEI Controller
Kernel driver in use: mei_me
Kernel modules: mei_me
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family 
USB Enhanced Host Controller #2 (rev 04)
Subsystem: Toshiba America Info Systems 7 Series/C210 Series Chipset 
Family USB Enhanced Host Controller
Kernel driver in use: ehci-pci
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family 
High Definition Audio Controller (rev 04)
Subsystem: Toshiba America Info Systems 7 Series/C210 Series Chipset 
Family High Definition Audio Controller
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI 
Express Root Port 1 (rev c4)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI 
Express Root Port 2 (rev c4)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI 
Express Root Port 3 (rev c4)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.3 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI 
Express Root Port 4 (rev c4)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family 
USB Enhanced Host Controller #1 (rev 04)
Subsystem: Toshiba America Info Systems 7 Series/C210 Series Chipset 
Family USB Enhanced Host Controller
Kernel driver in use: ehci-pci
00:1f.0 ISA bridge: Intel Corporation HM76 Express Chipset LPC Controller (rev 
04)
Subsystem: Toshiba America Info Systems HM76 Express Chipset LPC 
Controller
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA 
Controller [AHCI mode] (rev 04)
Subsystem: Toshiba America Info Systems 7 Series Chipset Family 6-port 
SATA Controller [AHCI mode]
Kernel driver in use: ahci
Kernel modules: ahci
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus 
Controller (rev 04)
Subsystem: Toshiba America Info Systems 7 Series/C210 Series Chipset 
Family SMBus Controller
Kernel modules: i2c_i801
02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5229 PCI 
Express Card Reader (rev 01)
Subsystem: Toshiba America Info Systems RTS5229 PCI Express Card Reader
Kernel driver in use: rtsx_pci
Kernel modules: rtsx_pci
03:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)
Subsystem: XAVi Technologies Corp. BCM43142 802.11b/g/n
Kernel driver in use: bcma-pci-bridge
Kernel modules: bcma
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI 
Express Fast/Gigabit Ethernet controller (rev 07)
Subsystem: Toshiba America Info Systems RTL8101/2/6E PCI Express 
Fast/Gigabit Ethernet controller
Kernel driver in use: r8169
Kernel modules: r8169

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

Saleh:

Thanks. Your system appears to be using:

03:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)
 Subsystem: XAVi Technologies Corp. BCM43142 802.11b/g/n
 Kernel driver in use: wl
 Kernel modules: bcma, wl

Please try uninstalling package 'bcmwl-kernel-source', reboot, and
assuming your wifi+bluetooth still works, please retest bluetooth audio
performance and repeat 'lspci -k'.

-

EVERYONE ELSE STILL AFFECTED BY THIS BUG:

Please try disabling your wifi, and then assuming bluetooth still works,
tell us if the problem persists with wifi disabled. Please also provide
output from 'lspci -k' and 'lsusb' on your machine.

** Changed in: bluez (Ubuntu)
   Status: Confirmed => Incomplete

** Changed in: linux (Ubuntu)
   Status: Confirmed => Incomplete

** Changed in: pulseaudio (Ubuntu)
   Status: Confirmed => Incomplete

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Saleh]

@Daniel van Vugt (vanvugt), here's my output!

$ lspci -k
00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller 
(rev 09)
Subsystem: Toshiba America Info Systems 3rd Gen Core processor DRAM 
Controller
Kernel driver in use: ivb_uncore
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor 
Graphics Controller (rev 09)
Subsystem: Toshiba America Info Systems 3rd Gen Core processor Graphics 
Controller
Kernel driver in use: i915
Kernel modules: i915
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family 
USB xHCI Host Controller (rev 04)
Subsystem: Toshiba America Info Systems 7 Series/C210 Series Chipset 
Family USB xHCI Host Controller
Kernel driver in use: xhci_hcd
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series 
Chipset Family MEI Controller #1 (rev 04)
Subsystem: Toshiba America Info Systems 7 Series/C210 Series Chipset 
Family MEI Controller
Kernel driver in use: mei_me
Kernel modules: mei_me
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family 
USB Enhanced Host Controller #2 (rev 04)
Subsystem: Toshiba America Info Systems 7 Series/C210 Series Chipset 
Family USB Enhanced Host Controller
Kernel driver in use: ehci-pci
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family 
High Definition Audio Controller (rev 04)
Subsystem: Toshiba America Info Systems 7 Series/C210 Series Chipset 
Family High Definition Audio Controller
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI 
Express Root Port 1 (rev c4)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI 
Express Root Port 2 (rev c4)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI 
Express Root Port 3 (rev c4)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.3 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI 
Express Root Port 4 (rev c4)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family 
USB Enhanced Host Controller #1 (rev 04)
Subsystem: Toshiba America Info Systems 7 Series/C210 Series Chipset 
Family USB Enhanced Host Controller
Kernel driver in use: ehci-pci
00:1f.0 ISA bridge: Intel Corporation HM76 Express Chipset LPC Controller (rev 
04)
Subsystem: Toshiba America Info Systems HM76 Express Chipset LPC 
Controller
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA 
Controller [AHCI mode] (rev 04)
Subsystem: Toshiba America Info Systems 7 Series Chipset Family 6-port 
SATA Controller [AHCI mode]
Kernel driver in use: ahci
Kernel modules: ahci
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus 
Controller (rev 04)
Subsystem: Toshiba America Info Systems 7 Series/C210 Series Chipset 
Family SMBus Controller
Kernel modules: i2c_i801
02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5229 PCI 
Express Card Reader (rev 01)
Subsystem: Toshiba America Info Systems RTS5229 PCI Express Card Reader
Kernel driver in use: rtsx_pci
Kernel modules: rtsx_pci
03:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)
Subsystem: XAVi Technologies Corp. BCM43142 802.11b/g/n
Kernel driver in use: wl
Kernel modules: bcma, wl
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI 
Express Fast/Gigabit Ethernet controller (rev 07)
Subsystem: Toshiba America Info Systems RTL8101/2/6E PCI Express 
Fast/Gigabit Ethernet controller
Kernel driver in use: r8169
Kernel modules: r8169

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

Please note most users won't have an ath9k chip, so that bug won't be
relevant to them.

If you _do_ have an ath9k chip (see your 'lsmod' or 'lspci -k') then
yeah bug 1746164 is probably the answer.

Everyone else, please reply to my question in comment #149.

** Attachment removed: "The output of lspci on my system."
   
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/405294/+attachment/5045388/+files/lspci.txt

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[amoeba]

The fix suggested by @PeterPall above solved the problem for me!!
AMAZING. Thank you so much.

 (fix copied from above) --
Create a file named /etc/modprobe.d/bluetooth-audio.conf with the following 
content:

options ath9k btcoex_enable=1 bt_ant_diversity=1
---

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Jakub Paś]

Still a problem with Sony WH-1000xm2 headsed.


Feb 10 02:33:17 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 218182 us (= 38484 bytes) in audio stream
Feb 10 02:33:17 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 343085 us (= 60520 bytes) in audio stream
Feb 10 02:33:18 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 218071 us (= 38464 bytes) in audio stream
Feb 10 02:33:18 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 343087 us (= 60520 bytes) in audio stream
Feb 10 02:33:20 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 1718049 us (= 303060 bytes) in audio stream
Feb 10 02:33:20 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 342982 us (= 60500 bytes) in audio stream
Feb 10 02:33:20 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 282044 us (= 49752 bytes) in audio stream
Feb 10 02:33:49 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 10705 us (= 1888 bytes) in audio stream
Feb 10 02:34:11 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 31721 us (= 5592 bytes) in audio stream
Feb 10 02:34:11 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 205154 us (= 36188 bytes) in audio stream
Feb 10 02:34:11 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 37079 us (= 6540 bytes) in audio stream
Feb 10 02:34:11 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 7092 us (= 1248 bytes) in audio stream
Feb 10 02:34:11 localhost pulseaudio[3304]: [bluetooth] 
module-bluetooth-device.c: Skipping 37116 us (= 6544 bytes) in audio stream

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[PeterPall]

Since the history of Bug 1746164 isn't visible here I'm adding the short
form here, too:

By default BT audio works fine on Ubuntu - if there is no WiFi active:
Both work on the same frequency range, 2 WiFi channel is about 20
Bluetooth Channels wide and every time a WiFi package is sent bluetooth
risks a packet loss.

We should ship things in a way that they work out-of-the-box => I am all
for providing this file with Ubuntu, possibly with Bluez.

In the case of my laptop btcoex_enable=1 would already do the trick.

Technical background:
 - https://wireless.wiki.kernel.org/en/users/drivers/ath9k/btcoex
 - https://wiki.freebsd.org/dev/ath_hal(4)/AntennaDiversity

Until the kernel default is updated Creating a file named
/etc/modprobe.d/bluetooth-audio.conf with the following content:

options ath9k btcoex_enable=1 bt_ant_diversity=1

should do the trick.

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Launchpad Bug Tracker]

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

** Changed in: linux (Ubuntu)
   Status: New => Confirmed

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[PeterPall]

Added "Linux" as affected package since the problem is caused by a
kernel default, not by a bug in bluez, see Bug 1746164.

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  A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[PeterPall]

A workaround that works on my system can be found at:
https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1746164

** Attachment added: "The output of lspci on my system."
   
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/405294/+attachment/5045388/+files/lspci.txt

** Also affects: linux (Ubuntu)
   Importance: Undecided
   Status: New

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

On second thoughts... it's been suggested today that this problem can be
caused by some wifi drivers disabling Bluetooth/Wifi coexistence by
default. When this happens and you're connected to a 2.4GHz wifi network
you wifi signal may drown out the Bluetooth.

So I wonder; can people who experience this problem please let us know
what model wifi/bluetooth chips you have? You can probably get that
information by running "lspci -k" and maybe from "lsusb".

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

Hi all,

If you would like to see fixes for issues like this in PulseAudio then
we suggest you talk to the PulseAudio people directly. You can do that
either by logging your own upstream bug or join the conversation here:
https://bugs.freedesktop.org/show_bug.cgi?id=88827

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Danica Khan]

Ubuntu 17.10. Stuttering and lagging sound makes games unplayable for
me. I hope this can get fixed after 9 years.

Best Regards

~ Danica Khan (danica.khan@freemail.services)

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[nsklaus]

i'm using ubuntu 17.10 (single boot) on a macbookpro early 2015 (12,1 model).
i have the apple airpods. they work fantastic with my android phone.

on linux though, it's another story. "it works" but the result is awful. 
useless.
first, there's lot of time it is not able to connect. it fails. then i retry 5, 
6 times and then it connects. when it works: audio is skipping, making long 
pauses, choppy sound most of the time. and i must stay close to the laptop or 
signal is lost.

- using bluetooth headset on osx and android (both unixes) is a really
good experience. they both perform really well.

- using bluetooth headset on linux with pulseaudio is a terrible
experience.

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Tim Werner]

I have this same exact issue for two years and was never able to use bluetooth 
audio with multiple headset devices on different pulseaudio devices.
tim.werner@freemail.services

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[JoaoH]

If it's any consolation, I mean I know this is an Ubuntu forum, but my
Manjaro system finally works with Bluetooth A2DP, no skipping and no
delay!

A few weeks ago some major updates were pushed and seems to be working
ever since.

Granted, the BT headphones connect as HSP and the default BT tools will
not switch it to A2DP, but that is where you download "BLUEMAN" and just
run through the setup for the particular device as Audio Sink. Once it
is connected, it is working and has been working for two weeks.

DELL XPS14 Core i7 with Atheros Wi-FI and BT card running Manjaro
Cinnamon Desktop 64bit.

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Sergio Arboleda]

same problem here, ubuntu 16.04. it is unbelievable that this bug is
being ignored. I suppose install Ubuntu LTS version because of the
support but this bug was reported since 8 years and not even assigned.

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Sergio Arboleda]

this talks really bad about Ubuntu support and lets you think if is it
worthy continue wasting time in a S.O that it's maintainers do not care
about its bugs.

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Re: [Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Kevin]

Can confirm. 17.10 works much better so far.

Rob Schultz <405...@bugs.launchpad.net> schrieb am Do., 2. Nov. 2017,
15:46:

> Interesting. I installed 17.10 and Bluetooth worked so much better than it
> had with 16.04 (I had basically given up using it).
> Then I re-installed to eliminate any of my changes as a contributor to a
> different issue and now Bluetooth stutters again.
>
> I've commented on bug 88827, but not sure where this goes from here.
> Bluetooth may seem like an nice-to-have item, but I use it daily.
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1665579).
> https://bugs.launchpad.net/bugs/405294
>
> Title:
>   A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in
>   audio stream"]
>
> Status in PulseAudio:
>   Confirmed
> Status in bluez package in Ubuntu:
>   Confirmed
> Status in pulseaudio package in Ubuntu:
>   Confirmed
>
> Bug description:
>   As I upgraded to the Karmic alpha, bluetooth audio (via a2dp) stopped
>   working properly. It was working fine in Jaunty.
>
>   My headphones are detected and configured by pulse, but the audio
>   skips as if it's spending half of each second paused. Music is
>   buffered so that after I click stop on rhythmbox (or whatever--it
>   happens with whatever player I use) the audio continues until it's
>   caught up.
>
>   syslog is full of the following lines:
>   Jul 27 08:55:45 carlin1 pulseaudio[3218]: alsa-source.c: Increasing
> minimal latency to 1.00 ms
>   Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c:
> Skipping 15128 us (= 2668 bytes) in audio stream
>   Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c:
> Skipping 36586 us (= 6452 bytes) in audio stream
>   Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c:
> Skipping 35593 us (= 6276 bytes) in audio stream
>   Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c:
> Skipping 36597 us (= 6452 bytes) in audio stream
>   Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c:
> Skipping 32601 us (= 5748 bytes) in audio stream
>   Jul 27 08:55:46 carlin1 pulseaudio[3218]: module-bluetooth-device.c:
> Skipping 32589 us (= 5748 bytes) in audio stream
>
>   This is with
>   bluez 4.45-0ubuntu4
>   pulseaudio1:0.9.15-4ubuntu2 0
>
>   pulseaudio version 1:0.9.16~test2-0ubuntu1~ppa3 from ubuntu-audio-dev
>   didn't help.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/pulseaudio/+bug/405294/+subscriptions
>

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Rob Schultz]

Interesting. I installed 17.10 and Bluetooth worked so much better than it had 
with 16.04 (I had basically given up using it).
Then I re-installed to eliminate any of my changes as a contributor to a 
different issue and now Bluetooth stutters again.

I've commented on bug 88827, but not sure where this goes from here.
Bluetooth may seem like an nice-to-have item, but I use it daily.

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

> FYI this problem sits high on the Pulseaudio bug list, but...

For Ubuntu users yes this is the "hottest" bug in the pulseaudio
package:

https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bugs?orderby=-heat=0

However, upstream have been mostly silent on this bug since January
2015:

https://bugs.freedesktop.org/show_bug.cgi?id=88827

Any solution here will likely come from upstream so if you continue to
experience this bug in Ubuntu 17.10 (and soon 18.04) please comment on
the above link.

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[GPratique]

@Konrad: thanks for taking the time to explain the situation details.

However I have to report that when switching to Windows 10, on the exact
same PC (just a drive swap), Bluetooth performs flawlessly with both my
speakers (JBL Flip 3 and UE Miniboom).

This suggests that it is not a hardware problem but a software one.

FYI this problem sits high on the Pulseaudio bug list, but...


Best Regards,

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[amoeba]

I have exactly the same issue with Dell XPS 13 (Atheros AR3012 bluetooth
adapter and AR9462 wireless adapter), Bose speaker, and the latest Linux
Mint. The bluetooth is almost unusable. It's unbelievable that such a
major bug is open since 2009.

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Konrad Zapałowicz]

Hey, let me chime in into the discussion.

First I'm terribly sorry to see that people are affected by this kind of issue.
I remember a similar one on Ubuntu Phone which we have finally tracked down to
the hardware side but were never able to fix completely.

Canonical as a company and we as a developers working on Ubuntu do actually care
about Bluetooth. Myself, Daniel and a few others formed an informal group that
meets regularly and strives to set the course for improvement. Believe me, we
would be delighted to see it working flawlessly because well... among other
reasons we also use Bluetooth devices on daily basis. However, sadly, it is not
that easy as the underlying technology itself is fairly complex and requires
both hardware, software and remote side to click in.

We are not searching for the white flag though :) this would be too easy.
Instead we plan our work in a way that we are able to take down issues and
gradually improve the overall experience. This is a step by step process where
we tackle problems one by one aiming for these that have the best chance to be
solved in order to deliver improvements with each cycle. 

In this case the audio in under running, PulseAudio tries to catch up and this
is why you see skipped bytes messages. There might be multiple reasons for this
starting from PulseAudio (and it's Bluetooth modules), through bluez, system
load and such and ending on the hardware configuration itself. For example
hugely popular WiFi+BT combo chipsets are prone to such issues as Bluetooth and
WiFi have to compete for throughput.

If I were you I would start from reporting this issue to Pulse Audio developers
through their mailing list (perhaps also on bluez) and start working from there.
We do keep an eye on these so if there is something interesting coming up in the
discussions we will pick it up. We will also remember about this one and for an
upcoming bluez 5.47 testing we will include high-load tests to see if we can
even experience this issue (so far we did not) with the hardware we test with.
Does it make sense?

Hope that at some point in the near future we will learn enough about this one
so that we can fix it.

Hope this helps,
K

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[GPratique]

@Daniel, please understand that this is not personal, and I know this is
not the right place for such a discussion, but where else ?

This problem is really annoying in 2017, 8 years after the bug was first
reported, in a world where bluetooth speakers are of everyday use.

I know this bug has been reported here but also under various Linux
subsystem. Googling it returns a massive amount of results each one
slightly different from the other, some with workaround, including from
the pulseaudio documentation (yes, I read it, tried, made things worse).

Basically this means that the root cause may not have been found yet.

Asking end users to report again and again the same bug in different
ways just makes it more difficult for the developers to understand and
ultimately correct.

I am fairly sure that 100 people declaring here to be affected by this
bug, means that a lot more are too. Maybe only 1 user out of 10 knows
how to report it. So the real amount is probably way higher.

@Daniel if you have any influence in this, please try to forward this
problem to whomever is able to fix it, it would be very much
appreciated.

Best regards,

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

PulseAudio is what implements most of the Bluetooth audio logic (not
BlueZ, surprising I know). You can contact the developers a few
different ways, documented here:

https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Community/

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[JoaoH]

Four or five years ago, A2DP just worked... ever since then, not ONE
device that I have tried works...tried internal/external bluetooth
modules, different brands, Dell, HP, Apple, Generic nothing works. Yet
on every device, I can switch to Windows and it works perfectly!

Now, I do not know whom to even contact to address this issue, is it
BlueZ, Pulse Audio, Alsa, or Engelbert Humperdinck... I spent $200 for a
nice pair of Sony BT Headphones, I built a custom PC to make Linux
scream, and I have to plug in the headphones by wire... This issue has
been documented, reported all over the internet, no one cares!

Joao

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

Indeed it is understandably disappointing, but you need to also consider
that many/most of us have never experienced any such skipping. And if
developers in particular can't reproduce the bug then it's less likely
to get fixed. That's not to say it's unimportant, but a simple matter of
nobody knows what to fix or how to test a fix when the problem isn't
reproducible.

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[GPratique]

Exact same symptoms on a Dell E6520, running linux Mint 18.2 x64, with
kernel 4.10.0-35-generic.

Tested with bluetooth speakers UE Mini Boom and JBL Flip 3.

I am absolutely stunned to find out that a bug from 2009 of this
magnitude is still open.

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

** Tags added: a2dp

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[Bug 405294] Re: A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio stream"]

[Daniel van Vugt]

** Summary changed:

- A2DP Bluetooth audio skips terribly
+ A2DP Bluetooth audio skips terribly ["Skipping NNN us (= MMM bytes) in audio 
stream"]

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