This ID is a standard across major manufacturers. If you look into the system information of premium devices, you will see it listed as the compatible ID for the UCM-UCSI ACPI Device Commonly found in HP EliteBooks ASUS ROG Gaming laptops, and Dell systems. Operating Systems: Managed by the UcmUcsiAcpiClient.sys driver, which handles the "OS Policy Manager" duties. Integrated into the kernel under drivers/usb/typec/ucsi/ucsi_acpi.c , where it matches specifically against the string Technical "Magic": The Mailbox Interface The implementation of
and click "Check for updates." Be sure to check the "Optional Updates" section as well. Install Chipset and Serial IO Drivers: pnp0ca0
From a technical perspective, PNP0CA0 is a type of ACPI device ID, which is used to identify and configure ACPI devices in a computer system. ACPI is a power management standard that allows operating systems to control and interact with hardware components to reduce power consumption and improve system efficiency. This ID is a standard across major manufacturers
: unplug the laptop, hold the power button for 15–60 seconds, and restart. This forces the hardware controller to re-handshake with the Windows UCSI driver. BIOS Implementation of UCSI - Intel : unplug the laptop, hold the power button
If the driver is missing, you might not notice an immediate crash. However, it can lead to:
The "0CA0" part of the name is a bit more obscure. In the ACPI specification, devices are identified by a unique _HID (Hardware ID) and _UID (Unique ID). The _HID for PNP0CA0 is actually "PNP0CA0", which corresponds to an " ACPI Power Management" device.