HP EliteBook 635 Aero G11 8840HS + Qualcomm WiFi7 QCNCM865 m2 card = No sound via Bluetooth

[xingyou123]

Dear HP community, hi!

I've got an HP EliteBook 635 Aero G11 (Ryzen 8840HS) laptop with terrible Mediatek WiFi 6E MT7922 RZ616 card which worked awfully. So, I bought a MSI Herald-BE PCIe wifi card which contains Qualcomm QCNCM865 m2 card inside. I pulled it out and installed into my laptop.

Wifi works great now but there is no sound through Bluetooth. I tried 2 different BT devices:

Edifier M21 stereo speaker

Huawei Freeclip headphones

Laptop pairs well with all of them, giving no errors or whatsoever but gives no sound through.

I tried drivers provided by MSI on a DVD and also latest available from Microsoft Update Catalog - Qualcomm Atheros Communications - Bluetooth - 3.1.0.1430.cab & Qualcomm Communications Inc. - Net - 3.1.0.1453.cab

Result is the same.

My system is:

Windows 11 Ent 24H2 build 26100.3915

AMD Software: AMD High-Definition Graphics Driver System 32.0.11020.6003 Rev.B

Wifi drivers 3.1.0.1453

HW Id PCI\VEN_17CB&DEV_1107&SUBSYS_E0F7105B&REV_01

BT drivers 3.1.0.1430

HW Id USB\VID_0489&PID_E10A&REV_0001

I also a little bit concerned why inside my connected headphones settings is mentioned Provider: AMD

[xingyou123]

I got a temporary workaround from here, by disabling the “AMD BT Audio Device” located under “Sound Video and Game Controllers” in the device manager all my issues were resolved BT audio works perfectly now.

I think it's the problem caused by the incompatibility of AMD BT Audio Device driver and Qualcomm's Bluetooth, how to fix it? 

[Banlix]

Try using the default Windows driver for audio via Bluetooth.

The quality is also very good in my opinion.

On my laptop there is also a bluetooth audio driver from the vendor, from Realtek (rtkbthlevdsp.inf). I just didn't set it there.
I also forgot how to set it like that because I didn't bookmark the website for the information. As I recall at that time I was looking for a bluetooth audio driver that had good compatibility and quality.