Microsoft Urges OEM Manufacturers to Fix Windows 11 USB-C Notification issues

Technology

Microsoft has issued a directive to its hardware partners, urging original equipment manufacturers (OEMs) to address configuration issues that hinder USB-C troubleshooting notifications in Windows 11.

USB-C Notification System in Windows 11

The built-in alerts in Windows 11 are designed to assist users by identifying and resolving common USB-C problems, such as slow charging, faulty connections, and the use of unsupported accessories. However, the effectiveness of these notifications relies heavily on the correct configuration by the manufacturers.

Technical Challenges and OEM Responsibilities

A recent technical update from Microsoft indicates that if these notifications are not appearing, it is likely due to incorrect platform settings by the OEMs rather than a flaw in the Windows operating system. The issue is primarily linked to the Advanced Configuration and Power Interface (ACPI) specification, which facilitates communication between the operating system and hardware components.

• Common errors include missing or incorrect ACPI descriptors.
• Mislabeling of port types, such as identifying a USB-A port as Type-C.
• Confusing internal ports with external ones, suppressing necessary notifications.

Recommended OEM Actions

To address these inconsistencies, Microsoft has provided a set of validation and testing protocols for OEMs. Manufacturers are advised to use the Windows Hardware Lab Kit (HLK) to validate USB port descriptors and ensure the correct implementation of specific ACPI methods, such as _UPC (USB Port Capabilities) and _PLD (Physical Location of Device).

OEMs are also encouraged to conduct extensive testing across various charging scenarios, including underpowered chargers and hubs, to ensure notifications perform as expected.

Security Considerations

Microsoft has also addressed security considerations, noting that some OEMs may disable data transfer over USB-C in certain environments. The recommendation is that such policies should only apply to externally accessible ports, and users should have the option to enable or disable data transfer.

Conclusion

Microsoft’s guidance to manufacturers is clear: audit USB port configurations, validate notification behaviors, and coordinate with the Microsoft Windows Hardware Compatibility Program (WHCP) to ensure compliance with standards. By following these steps, OEMs can ensure a seamless and reliable user experience with Windows 11.