Bug 480320

Summary:	bluetooth headphones switch to low quality mode
Product:	[Plasma] plasmashell	Reporter:	Flap <frambooisier>
Component:	Bluetooth in general	Assignee:	David Rosca <nowrep>
Status:	RESOLVED FIXED
Severity:	normal	CC:	kdedev, nate, nowrep, plasma-bugs-null, surlaget
Priority:	NOR
Version First Reported In:	6.2.4
Target Milestone:	1.0
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Flap 2024-01-25 14:47:59 UTC

SUMMARY
***
interacting with discord settings page, and with audio applet on the buttom right side causes my Sony XM-3 bluetooth headphones to switch from any good quality codec/mode like APTx or LDAC to headset unit mode with cvsd and mSBC codecs, the sound quality is terrible and I can hear myself from build in mic. I cannot go back to other codecs, missing options in the kde sound settings.
***


STEPS TO REPRODUCE
1. connect bluetooth headphones
2.  make sure it's on high sound quality mode
3.  open sound applet, or open discord sound and voice settings
4.  headphones should switch to low quality mode

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS

Linux/KDE Plasma: Kubuntu 23.10
(available in About System)
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.112.0
Qt Version:  5.15.10

ADDITIONAL INFORMATION
I use easyeffects, but I am not sure if it affects anything more testing needed

Comment 1 surlaget 2024-03-11 03:59:28 UTC

I am experiencing the same issue on Plasma 6.0.1 / Frameworks 6.0.0. The sound settings page only allows selecting high quality after disconnecting and reconnecting the headset. However, I wasn't experiencing this issue on 5.27.

Comment 2 TraceyC 2024-12-18 21:23:54 UTC

I tested this with Discord on Plasma 6.2.4 on two different laptops, and can't reproduce this.
I'm pretty sure I had run into this in the past.

Setup: Sony WF-1000MX4 Bluetooth earbuds connected to the laptop, using the AAC codec.

1. Go into Discord settings - Voice & Video. Observed that the sound codec for the earbuds switched to mSBC (seen in the sound applet)
2. Exit Discord settings

The sound profile automatically switched back to AAC.

If anyone affected by this issue can still reproduce it, please reopen this bug report. Thanks!

Comment 3 Flap 2024-12-19 12:17:31 UTC

One thing worth noting is that if my headphones are connected to android phone while being connected to PC the same exact problem happenes. Since it did not happen for me in a long time and Im still using old plasma then it would be important to determine if that was the most occuring problem for others.

Comment 4 TraceyC 2024-12-19 18:14:06 UTC

I re-tested, making sure my earbuds were connected to both my laptop and phone. I am still unable to reproduce the bug.

Comment 5 Flap 2024-12-20 11:41:08 UTC

(In reply to Flap from comment #3)
> One thing worth noting is that if my headphones are connected to android
> phone while being connected to PC the same exact problem happenes. Since it
> did not happen for me in a long time and Im still using old plasma then it
> would be important to determine if that was the most occuring problem for
> others.

WF-1000MX4 earbuds use bluetooth 5.2 which supports which supports multi-stream audio, since my headphones use BL 4.2 its possible that the problem is present on older version of Bluetooth. I dont have other headphones to test on as of now.