No sound output when switching to LDAC Bluetooth profile in KDE on openSUSE with PipeWire

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1

On openSUSE with PipeWire, when switching Bluetooth audio profiles in KDE (both for PulseAudio and PipeWire), there is no sound output when selecting the LDAC profile. This issue occurs consistently after switching between the mSBC and other (specially LDAC) profiles.

Steps to reproduce:

Connect a Bluetooth device (e.g., headphones or speaker).

Select the LDAC profile and play media in Firefox (sound is output correctly).

Switch to the mSBC profile (sound is still output correctly).

Switch back to the LDAC profile (video is playing, but there is no sound).

Switch to the mSBC profile again (sound is output correctly).

Switch back to the ACC profile (video is playing, but there is no sound).

Switch to the mSBC profile again (sound is output correctly).

Set the LDAC profile again (no sound). Disconnect the Bluetooth device, reconnect, and select the LDAC profile (sound is output correctly).

If the profile is changed and then set back to LDAC or other profile that's not mSBC, the issue persists: no sound output, and the following logs appear:

Feb 06 15:23:47 tuxedo01 systemsettings[59308]: org.kde.pulseaudio: No object for name "bluez_output.10_4F_A8_DA_C2_E0.1"
Feb 06 15:23:54 tuxedo01 kded6[2567]: org.kde.pulseaudio: No object for name "bluez_output.10_4F_A8_DA_C2_E0.1"
Feb 06 15:23:54 tuxedo01 plasmashell[2662]: org.kde.pulseaudio: No object for name "bluez_output.10_4F_A8_DA_C2_E0.1"
Feb 06 15:23:54 tuxedo01 systemsettings[59308]: org.kde.pulseaudio: No object for name "bluez_output.10_4F_A8_DA_C2_E0.1"
Feb 06 15:23:54 tuxedo01 systemsettings[59308]: org.kde.pulseaudio: No object for name "bluez_output.10_4F_A8_DA_C2_E0.1"

Additional notes:
The issue is observed with both PipeWire and PulseAudio backends in KDE.
Uninstalling PipeWire and using PulseAudio with KDE’s two available profiles still results in no sound after switching to LDAC.
I am using wayland with KDE6/Opensuse TW.
I am using Sony headphones.

2

Hi! For reference, it looks like you’ve also filed a report in the KDE Bugtracking System for this issue: 499605 – No sound output when switching to LDAC Bluetooth profile in KDE on openSUSE with PipeWire

This is definitely not my area of expertise, but just as an idea to get things started - is what you’re trying to do, something that can also be done via the command line using bluetoothctl? And if so, does it function correctly there? That might help figure out if it’s something in the KDE components, or something upstream in BlueZ.

3

Hi,

Thank you for your reply. I tried using the cli, I had the same issue.

I posted this issue on the opensuse subreddit. Someone replied and said he is experiencing the same problem, the only way to fix it is by reversing the pulseAudio version. Looks like there’s a bug in the pulseAudio package.

Regards,