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Locked

‎07-17-2025 12:47 AM

HP Recommended
Product: HP Envy x360 14 inch 2-in-1 Laptop PC 14-fa-0000 (8Z8P5AV)

Symptoms:

  • Persistent audio crackling/pops during playback (even at idle)

  • System stutters after sleep/wake cycles

  • Confirmed DPC latency spikes >16ms via LatencyMon

Key Evidence:

  1. Driver-Level Failures:

    • dxgkrnl.sys (DirectX): 16,546µs DPC latency

    • Wdf01000.sys (Kernel): 28,892µs DPC latency

  2. Firmware Triggers:

    • Issues persist in Performance Mode (CPU throttling disabled)

    • ACPI resume delays (_WAK method) cause USB/audio desync

Troubleshooting Done:

  • ✔️ Clean Windows 11 install

  • ✔️ Latest Realtek/AMD drivers

  • ✔️ Wi-Fi/Bluetooth disabled

  • ✔️ EFI Diagnostics (all hardware passed)

Request:

  1. Escalate to HP firmware team for:

    • BIOS F.06 with ACPI/EC timing fixes

    • Realtek audio interrupt prioritization

  2. Community advice on:

    • Temporary workarounds

    • BIOS settings to mitigate latencyStartup no wifi no bluetooth no appsStartup no wifi no bluetooth no appsLatencyMon_09_PerformanceMode_3h49min_AutoCAD_Music_InputLag.pngLatencyMon_09_PerformanceMode_3h49min_AutoCAD_Music_InputLag.png

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