Re: 16 Aurora AC16250, audio buzzing, lag, high DPC latency issue on Windows

Title: audio buzzing and lag and high DPC latency issue on Windows (Device Originally Ubuntu)

Hello Dell Community,

I am experiencing a persistent audio buzzing and latency issue on my Dell laptop, and I would really appreciate your help. My device originally shipped with Ubuntu, but I installed Windows 11 and later tried Windows 10 as well.

The issue occurs in multiple scenarios:

While playing videos
When plugging/unplugging the charger
During sleep and wake transitions

Troubleshooting steps I have already tried:

Clean installation of Windows 10 and Windows 11
Updating drivers via Windows Update and official tools
Testing different power modes (Balanced, High Performance)
Using LatencyMon → shows high latency related to ACPI.sys and graphics drivers
Disabling Intel GPU (issue reduced but not fully resolved)
Testing on Ubuntu → the issue does not occur
lag on pc

Based on my testing, I suspect this is related to:

ACPI / Power Management
GPU switching (Intel + NVIDIA)
Driver compatibility with Windows

Could you please advise:

Are there any official or compatible Windows drivers for this model?
Is there a BIOS update or firmware fix for this issue?
Any recommended settings to eliminate DPC latency and audio noise?

Thank you in advance for your support.

Best regards,

System: Alienware 16 Aurora AC16250

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16 Aurora AC16250, audio buzzing, lag, high DPC latency issue on Windows

Responses(2)
Solutions(0)

G

GauravSyst

2 Intern

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324 Posts

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16 Points

1

May 4th, 2026 09:04

Well you done most of the fix one can try so i will suggest you to try this as well you you not try it:

Disable audio enhancements:
- Sound Settings → Output device → Properties
- Turn OFF enhancements
Set format:
- 16-bit, 44100 Hz (CD Quality)
Try:
- Different audio driver version from Dell (older sometimes better)