High Definition Audio Controller Error on Precision Laptops

Affected Platforms:

• Dell Pro Max 14 Premium MA14250
• Dell Pro Max 16 Premium MA16250
• Precision 5690
• Precision 7680
• Precision 7780

Symptoms:

• The High Definition Audio Controller shows error code 55 in the device manager.
  
• There is no audio using an external monitor connected to the computer due to the driver being in an error state.

A combination of settings causes this issue:

• Enable Pre-Boot DMA Support and Enable OS Kernel DMA Support being enabled in the BIOS.
• The Group Policy Object: Enumeration policy for external devices incompatible with Kernel DMA Protection is enabled.
• Enumeration Policy is set to Only while logged in (default) or block all.

When these settings are configured in this way, it causes error code 55 with the High Definition Audio Controller as it does not contain DMA remapping.

Updating the BIOS to version 1.17.0 or later on the computer resolves the issue. To download and install the BIOS, refer to the BIOS Update Guide.

After updating the BIOS, you must enable Internal Port DMA Compatibility Mode under the Virtualization Section of the BIOS.