Recognized as the UCM-UCSI ACPI Device in Device Manager under the "USB Connector Managers" section.
Because the PNP0CA0 device is responsible for essential USB-C functions like negotiating power delivery and DisplayPort Alternate Modes, when it malfunctions, the symptoms can range from annoying to debilitating.
In some systems, UCSI must be explicitly enabled in the BIOS settings.
Device Manager └── ⚠️ Universal Serial Bus controllers └── ⚠️ UCM-UCSI ACPI Device (This device cannot start. Code 10) Why These Errors Occur pnp0ca0
The ACPI tables inside an old BIOS cannot map the UCSI registers correctly on newer Windows builds.
ls /sys/bus/acpi/devices/*PNP0CA0* cat /sys/bus/acpi/devices/*PNP0CA0*/status
Enables a single USB-C port to handle charging, high-speed data transfer, and video output simultaneously if supported by the hardware. Recognized as the UCM-UCSI ACPI Device in Device
This article is an in-depth guide to understanding and fixing issues related to the pnp0ca0 device. We will demystify what this identifier means, explore the technical role it plays (especially in the ACPI and Plug-and-Play systems), and provide comprehensive troubleshooting steps for both Windows and Linux users. Our goal is to turn an unknown error into a solvable problem.
Without a functioning PNP0CA0 interface, advanced USB-C features collapse into basic legacy behaviors:
: USB Type-C Connector System Software Interface —the standardized interface allowing an OS to talk to an Embedded Controller (EC). This article is an in-depth guide to understanding
The PNP0CA0 device has had a rather complicated history with Windows. In earlier versions of Windows, such as Windows XP and Windows Vista, PNP0CA0 was a critical device driver that required manual configuration.
Are you seeing an (like Code 10 or Code 43) in your Device Manager for this specific entry? BIOS Implementation of UCSI