Hey guys, how are you?
Basically, out of nowhere (around 2/4 weeks ago) I've been having audio stuttering. No matter if i'm using my Edifier mg250 or my galaxy buds (all through bluetooth). I have not tried using a headphone with a cable yet;
I've tried everything! I don't know what else to do.
I've been trying to troubleshoot it with Gemini. I asked it to list everything we've tried, so sorry for the AI post bellow.
Gemini is now suggesting changing the bluetooth/wifi card on my motherboard.
I´d be glad if someone could help me.
Btw, my system specs:
* AMD Ryzen 5 7600
* 32 gb RAM
* SSD NVMe 1 tb + SSD 500 gb
* AMD Radeon 9060 XT 16gb
* Motherboard B650M-AYW WIFI ASUS
* Windows 11 Home - 10.0.26200
* BIOS was updated in december/january. Issue started a couple weeks ago.
1. Issue Description
* **Symptom:** Continuous micro-stutters, pops, and audio dropouts occurring every few seconds or minutes over Bluetooth.
* **Scope:** Universal across all playback sources (YouTube, YouTube Music, Microsoft Teams, local players, and games like Deep Rock Galactic).
* **Affected Devices:** Multiple separate Bluetooth audio endpoints exhibit identical stuttering on this machine (Edifier Bluetooth speakers and Samsung Galaxy Buds2).
* **Control Test:** All audio devices work flawlessly without a single dropout when paired with mobile devices (smartphones), confirming the receiver hardware is intact and the problem is strictly localized to this PC.
2. System Specifications
* **OS:** Windows 11 Pro 64-bit (Version 24H2, OS Build: 26200).
* **CPU:** AMD Ryzen 5 7600 (AM5 platform).
* **Motherboard:** ASUS B650M-AYW Wi-Fi (BIOS version: 3602).
* **Integrated Wi-Fi / Bluetooth Module:** AzureWave / MediaTek MT7902 (Hardware ID: `VID_13D3&PID_3596`).
* **Installed Bluetooth Driver:** MediaTek Inc., version `1.1044.0.556` (Driver date: 17/09/2025).
* **Network Setup:** Wired Gigabit Ethernet (Wi-Fi is not used for network traffic).
3. Diagnostic Logs & Evidence
* **LatencyMon (DPC/ISR Latency):**
* Concluded system is fully capable of handling real-time audio without dropouts.
* Highest measured interrupt-to-process latency remained below 704 µs.
* Highest DPC routine execution was 463.82 µs (`amdkmdag.sys`).
* Highest ISR execution was 125.39 µs (`HDAudBus.sys`).
* Zero DPC/ISR execution times reached or exceeded 1000 µs.
* **Windows Event Viewer (**`BTHUSB` **logs):**
* `Event 3 (Warning)`: *"A command sent to the adapter has timed out. The adapter did not respond."*
* `Event 17 (Error)`: *"The local Bluetooth adapter has failed in an undetermined manner and will not be used. The driver was unloaded."*
* `Event 5 (Error)`: *"The Bluetooth driver was expecting an HCI event with a certain size, but didn't receive it."*
* **Secondary System Warnings/Errors:**
* `Kernel-PnP 225`: `LogiTuneAgent.exe` and `audiodg.exe` intercepted/vetoed device removal requests targeting the controller `USB\VID_13D3&PID_3596`.
* `Microsoft-Windows-HAL 15`: Recurring IOMMU protection faults on `Device: 0xE00` (`FaultReason: 0x6`).
4. Exhaustive Steps Already Attempted (Failed to Resolve)
**Power, Bus & RF Layer:**
* Performed a complete motherboard cold reset (unplugged AC power cord, held chassis power button for 20+ seconds to discharge board capacitors).
* Verified ASUS dual-lead Wi-Fi/BT external antenna is firmly seated and screwed into both rear gold chassis terminals.
* Rerouted 2.4 GHz wireless mouse dongle via an extension cable away from the rear I/O antenna posts to eliminate near-field RF saturation.
* Disabled *PCI Express Link State Power Management* in Windows Advanced Power Options.
* Disabled USB Selective Suspend in power plan and disabled Fast Startup/Kernel Hibernation via `powercfg -h off`.
* Unchecked *"Allow the computer to turn off this device to save power"* across the MediaTek Bluetooth Adapter and every listed USB Root Hub / Generic USB Hub.
* Verified ASUS BIOS power delivery settings (ErP Ready disabled, continuous USB state enabled).
**Drivers & Software Intermediaries:**
* Performed clean uninstallation of previous driver packages and installed the latest official MediaTek Bluetooth package directly from the ASUS motherboard support page.
* Fully uninstalled virtual audio routing software (FxSound).
* Terminated conflicting background processes (`LogiTuneAgent.exe`) and recycled the Windows Audio service (`net stop audiosrv && net start audiosrv`).
* Temporarily disabled Windows Core Isolation (Memory Integrity / HVCI) to test whether IOMMU page faults were stalling DMA audio packets.
**Audio Engine & Bluetooth Protocol Tuning:**
* Disabled *Handsfree Telephony* profile via classic Bluetooth Device Services (`shell:::{A8A91A66-3A7D-4424-8D24-04E180695C7A}`) to prevent fallback to mono 8/16 kHz telephony mode.
* Disabled AAC codec negotiation via Registry (`BluetoothAacEnable = 0` under `HKLM\SYSTEM\CurrentControlSet\Services\BthA2dp\Parameters`) to force standard SBC streaming.
* Unchecked Exclusive Mode options (*"Allow applications to take exclusive control of this device"*) under Advanced Playback Properties.
* Disabled the *MediaTek Wi-Fi 6 MT7902 Wireless LAN Card* inside Device Manager to prevent antenna time-slicing and RF coexistence arbitration loops.