Bluetooth sound extreme low quality

Bug #1738404 reported by Carlos Blanquer Bogacz
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
bluez (Ubuntu)
Undecided
Unassigned

Bug Description

I upgraded today from ubuntu 17.04 to ubuntu 17.10.

I use 3 different bluetooth audio devices ( BT earphones, BT speaker, BT BOSE Soundlink speaker) , all of them worked properly on 17.04.

Since the upgrade, the sound gets continuous interruptions/cracking.
These sound interruptions and cracking are so annoying that I cannot keep on listening to music.
I could relate this to the fact that a new BT stack has replaced the former in Ubuntu.

If I use wired devices (hdmi connected screen+audio, the sound quality is good and as before) so the issue is related to the use of the new Bluetooth stack.
I have not found a way to parameterise it neither.

I have not found any similar report. "apport" seems not ot exist in thise version, I cannot find and execute it.

Revision history for this message
Ubuntu Foundations Team Bug Bot (crichton) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1738404/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

tags: added: bot-comment
Paul White (paulw2u)
affects: ubuntu → bluez (Ubuntu)
Revision history for this message
Carlos Blanquer Bogacz (cblanquer) wrote :

As I could not get data about the package, here is the hardware I am running on.
Apparently bluetooth is enabled without problem but audio streaming is still working with :

carlos@XS35V4:~$ lspci
00:00.0 Host bridge: Intel Corporation Atom Processor Z36xxx/Z37xxx Series SoC Transaction Register (rev 0e)
00:02.0 VGA compatible controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display (rev 0e)
00:13.0 SATA controller: Intel Corporation Atom Processor E3800 Series SATA AHCI Controller (rev 0e)
00:14.0 USB controller: Intel Corporation Atom Processor Z36xxx/Z37xxx, Celeron N2000 Series USB xHCI (rev 0e)
00:1a.0 Encryption controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Trusted Execution Engine (rev 0e)
00:1b.0 Audio device: Intel Corporation Atom Processor Z36xxx/Z37xxx Series High Definition Audio Controller (rev 0e)
00:1c.0 PCI bridge: Intel Corporation Atom Processor E3800 Series PCI Express Root Port 1 (rev 0e)
00:1c.1 PCI bridge: Intel Corporation Atom Processor E3800 Series PCI Express Root Port 2 (rev 0e)
00:1c.2 PCI bridge: Intel Corporation Atom Processor E3800 Series PCI Express Root Port 3 (rev 0e)
00:1c.3 PCI bridge: Intel Corporation Atom Processor E3800 Series PCI Express Root Port 4 (rev 0e)
00:1f.0 ISA bridge: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Power Control Unit (rev 0e)
00:1f.3 SMBus: Intel Corporation Atom Processor E3800 Series SMBus Controller (rev 0e)
01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188EE Wireless Network Adapter (rev 01)
02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTL8411 PCI Express Card Reader (rev 01)
02:00.2 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0a)

carlos@XS35V4:~$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 001 Device 004: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 001 Device 003: ID 04d9:1702 Holtek Semiconductor, Inc. Keyboard LKS02
Bus 001 Device 005: ID 09da:000a A4Tech Co., Ltd. Optical Mouse Opto 510D / OP-620D
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

carlos@XS35V4:~$ dmesg | grep Bluetooth
[ 6.503447] Bluetooth: Core ver 2.22
[ 6.503478] Bluetooth: HCI device and connection manager initialized
[ 6.503483] Bluetooth: HCI socket layer initialized
[ 6.503486] Bluetooth: L2CAP socket layer initialized
[ 6.503495] Bluetooth: SCO socket layer initialized
[ 7.087867] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 7.087871] Bluetooth: BNEP filters: protocol multicast
[ 7.087877] Bluetooth: BNEP socket layer initialized
[ 25.200643] Bluetooth: RFCOMM TTY layer initialized
[ 25.200659] Bluetooth: RFCOMM socket layer initialized
[ 25.200670] Bluetooth: RFCOMM ver 1.11

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

A few ideas come to mind:

- Cambridge Silicon Radio dongles are historically unreliable. I found my Bluetooth devices were excessively buggy with them. And other people found the same. Try a different brand if you can.

- Can you please check what audio profile you're using in sound settings for Bluetooth? Make sure it is A2DP for the best quality. Not HSP/HFP. Is the problem just the wrong profile defaulting?

- Bug 405294

- Kernel regressions... Please try an older kernel more in line with what 17.04 had (kernel version 4.10 or older): http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D

Probably less relevant:

- A regression in bluetooth in 17.10; sounds like it is Intel specific though: bug 1729389

Changed in bluez (Ubuntu):
status: New → Incomplete
Revision history for this message
Carlos Blanquer Bogacz (cblanquer) wrote : Re: [Bug 1738404] Re: Bluetooth sound extreme low quality
Download full text (3.2 KiB)

Hi Daniel,

- Cambridge Silicon Radio dongles are historically unreliable. I found
my Bluetooth devices were excessively buggy with them. And other people
found the same. Try a different brand if you can.

I have reverted back to Ubuntu 17.04 some minutes ago and the 3x bluetooth
audio devices work again correctly, as they did before and as they do with
my android devices.
So I do not think, this is related to any hardware issue.
I have then installed all the updates and that is stilll working.

- Can you please check what audio profile you're using in sound settings
for Bluetooth? Make sure it is A2DP for the best quality. Not HSP/HFP.
Is the problem just the wrong profile defaulting?

The only available profile was A2DP in 17.10, which I already used.
HSP/FSP did not appear in the list.

-----------
I also tested form an USB with 17.10 for installation, same issues.

I think I am not doing any other actions, as my immediate incident is
solved by reverting to the former version.
I hope the actual problem get fixed until next Ubuntu stable release.

Best regards,

Carlos Blanquer Bogacz
_______________________________________

水に流す mizu ni nagasu : let us flow in the water

On 18 December 2017 at 11:45, Daniel van Vugt <<email address hidden>
> wrote:

> A few ideas come to mind:
>
> - Cambridge Silicon Radio dongles are historically unreliable. I found
> my Bluetooth devices were excessively buggy with them. And other people
> found the same. Try a different brand if you can.
>
> - Can you please check what audio profile you're using in sound settings
> for Bluetooth? Make sure it is A2DP for the best quality. Not HSP/HFP.
> Is the problem just the wrong profile defaulting?
>
> - Bug 405294
>
> - Kernel regressions... Please try an older kernel more in line with
> what 17.04 had (kernel version 4.10 or older): http://kernel.ubuntu.com
> /~kernel-ppa/mainline/?C=N;O=D
>
>
> Probably less relevant:
>
> - A regression in bluetooth in 17.10; sounds like it is Intel specific
> though: bug 1729389
>
> ** Changed in: bluez (Ubuntu)
> Status: New => Incomplete
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1738404
>
> Title:
> Bluetooth sound extreme low quality
>
> Status in bluez package in Ubuntu:
> Incomplete
>
> Bug description:
> I upgraded today from ubuntu 17.04 to ubuntu 17.10.
>
> I use 3 different bluetooth audio devices ( BT earphones, BT speaker,
> BT BOSE Soundlink speaker) , all of them worked properly on 17.04.
>
> Since the upgrade, the sound gets continuous interruptions/cracking.
> These sound interruptions and cracking are so annoying that I cannot
> keep on listening to music.
> I could relate this to the fact that a new BT stack has replaced the
> former in Ubuntu.
>
> If I use wired devices (hdmi connected screen+audio, the sound quality
> is good and as before) so the issue is related to the use of the new
> Bluetooth stack.
> I have not found a way to parameterise it neither.
>
> I have not found any similar report. "apport" seems not ot exist in
> thise version, I cannot find and execute it.
>
> To manage...

Read more...

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

OK. If you wish to use Ubuntu 17.10 or later and still have a problem then please try the next step: Find an older kernel more in line with what 17.04 had (kernel version 4.10 or older): http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D

If you can find the kernel version it stopped working in then we can work with the kernel team to get a fix.

Revision history for this message
Launchpad Janitor (janitor) wrote :

[Expired for bluez (Ubuntu) because there has been no activity for 60 days.]

Changed in bluez (Ubuntu):
status: Incomplete → Expired
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