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May 4th, 2026 04:31
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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GauravSyst
2 Intern
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324 Posts
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16 Points
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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:
anne_droid
5 Journeyman
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5.9K Points
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May 4th, 2026 10:40
Hi
https://www.dell.com/support/product-details/en-us/product/alienware-aurora-ac16250-gaming-laptop/drivers
Has 43 listed drivers.
AND these 4 seem particularly relevant...