Pnp0ca0 2021 Jun 2026

Right-click the Windows Start menu icon and click .

Windows Update failed to install the correct UCM-UCSI driver.

To understand what PNP0CA0 does , one must observe its absence. When a Linux system boots, the kernel’s ACPI driver parses the Differentiated System Description Table (DSDT) provided by the BIOS. If the DSDT contains a Device entry with _HID (Hardware ID) equal to PNP0CA0 , the kernel will load a specific driver, typically acpi_processor or a dedicated platform driver, to manage that container. pnp0ca0

Restart your computer. Windows will re-examine the ACPI tree upon boot and cleanly reload the driver.

The hardware ID refers to the UCM-UCSI ACPI Device , which is the software interface for managing USB Type-C connectors on a computer. Technical Role Right-click the Windows Start menu icon and click

: The ID pattern ACPI\PNP0CA0 or *PNP0CA0 designates a hardware description interface for the USB Type-C Connector System Software Interface (UCSI) .

Since PNP0CA0 is tied to the motherboard's root bus, the solution almost always lies in the . When a Linux system boots, the kernel’s ACPI

Usually implies the operating system timed out while waiting for a response from the motherboard firmware or embedded controller.

If this device node functions incorrectly, your USB-C ports lose their "smart" features and may revert to standard, low-power data ports. The PNP0CA0 node controls:

If the driver stack is corrupted, forcing Windows to rebuild it can clear the problem:

Directing power into the laptop battery from a wall charger. 2. Alternate Mode (Alt-Mode) Switching