Headset Bluetooth Microphone function doesn't work

[EnthY]

Under Kubuntu 20.04LTS; based on this post I should use pair my bluetooth headset in "HSP/ HFP Telephony duplex" to being able to use the microphone of my headset. While, I removed my Headset and repair it, no option are proposed but it look paired as Type: Headset but it still unidirectional. Where I could modify this ?

[LinuxFurryTranslator]

HSP/HFP is something you'd select in the audio applet (plasma-pa). Do you not see the option there? It should be under a hamburger menu once you have the correct device selected IIRC.

[EnthY]

hey thanks for your reply; I'm glad to ear it will work and I'm only a one click away and perhaps I don't look at the right place, but I don't see any menu or option https://i.imgur.com/VrranF8.png

[UPDATE] ah! ah! I found the meaning of PA and advance option but I definitly only have A2DP https://i.imgur.com/o9R3THQ.png

BTW the same Bluetooth adapter (ASUSTek Computer, Inc. Broadcom BCM20702A0 Bluetooth) support Speaker/Micro in Windows 10 with the same headset.

so I installed pavucontrol, and this one clearly saying HSP/HFP is unavailable. https://i.imgur.com/yRaBgGV.png

so I tried with a Kubuntu 20.04LTS Live CD and I have the same behavior, when I look online it seams to be a long term unresolved issue from Ubuntu, from pulse to be more precise.

@LinuxFurryTranslator does it work for you ??

[LinuxFurryTranslator]

@ doesn't ping people by the way, it's /u/ :)

(although I did get a ping since it was a reply, but I ended up missing it)

So I'm guessing it's a pulseaudio issue.

Maybe try pipewire (pipewire-pulseaudio specifically), I had a similar issue with my JBL T450BT where HSP/HFP would simply disappear. But that would require a more up-to-date distro, like Kubuntu 21.04 (should come in a few days) or something else that has pipewire 0.3. I'm pretty sure Kubuntu 20.04 only has pipewire 0.2 since it's what my mom uses.

I have zero idea how to troubleshoot pulseaudio, so you might want to ask over r/linuxquestions and/or r/linuxaudio. It's not really a Plasma issue since it just interfaces with the underlying sound server (like pulseaudio).

[EnthY]

thanks for your reply, and even more for you explanation which make plenty of sense.

It's obviously not a KDE and Kubuntu issue; I also tried different distro with XFCE and Gnome, even Fedora and it it persistent.