Alienware x16 R2 Does Not Recognize the Microphone on a Bluetooth Headset

Summary: Learn about Alienware x16 R2 laptops with Killer 1750x Wi-Fi modules not recognizing the microphone on any Bluetooth Headset.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
Check out other resources

Symptoms

Alienware x16 R2 laptops with Killer 1750x Wi-Fi modules may not recognize the microphone on any Bluetooth Headset. The earphones of the Bluetooth headset function without issue, only the microphone function of the headset is affected.

Affected Platform:

  • Alienware x16 R2

Affected BIOS Versions:

  • 1.1.0
  • 1.2.0
Note: The internal Array Microphone works without issue.
Note: Headsets with a Radio Frequency (RF) dongle are unaffected by this issue.

Cause

The Bluetooth signal setting is incorrect causing the Headset Microphone not to function.

Resolution

Note: Before starting the update, perform the following:
  • Back up all personal data. For more information, refer to Back Up and Recovery.
  • Connect the AC adapter.

Updating the BIOS to version 1.3.1 or later on the computer resolves the issue. To download and install the BIOS, refer to the BIOS Update Guide.

Affected Products

Alienware x16 R2
Article Properties
Article Number: 000224871
Article Type: Solution
Last Modified: 21 May 2026
Version:  6
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.