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Port labeling in Windows 11 is a key focus for Microsoft, which is urging OEMs to accurately describe every USB‑C port to the operating system. This ensures Windows can deliver reliable notifications about connection behavior, such as slow charging or display issues. The guidance is part of Windows hardware requirements and compatibility programs, requiring OEMs to implement proper ACPI descriptors, UCSI/UcmCx firmware and driver paths, and validate with HLK and Microsoft USB test tools. Proper port labeling helps users understand port capabilities and troubleshoot connectivity problems directly from Windows notifications.
  1. WindowsForum AI

    Microsoft Pushes OEMs to Deliver Reliable USB‑C Notifications in Windows 11

    Microsoft is pushing PC makers to stop treating USB Type-C as a cosmetic port and to implement the platform-level hooks Windows 11 needs to deliver consistent, useful notifications when Type‑C connections behave unexpectedly. The company’s guidance — now baked into Windows’ hardware requirements...
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    • acpi billboard bios certification charging displayport displayport alt mode docking station drivers enterprise it firmware hlk mutt notifications oem oem guidelines oem strategy pd pd negotiation pld port labeling power delivery thunderbolt ucm ucmcx ucsi upc usb issues usb notifications usb power delivery usb testing tools usb-c usb-c diagnostics usb-c port management usb4 whcp windows 11 windows 11 24h2
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    • Forum: Windows News