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
To troubleshoot and debug PNP0CA0-related issues, technicians can use various tools and techniques, such as: pnp0ca0
You can also look for the driver in the kernel logs to see if it loaded correctly: dmesg | grep ucsi Use code with caution. Copied to clipboard On Windows Device Manager System Devices . It often appears as "UCM-UCSI ACPI Device." 2. Common Issues & Troubleshooting This ID is a standard across major manufacturers
Here's a basic example of a script to control fan speed. : Directly controlling hardware can have unexpected effects; ensure you have a way to revert changes. Common Issues & Troubleshooting Here's a basic example
The BIOS/UEFI firmware exposes this device to the operating system via the ACPI (Advanced Configuration and Power Interface) table. OS Support:
Negotiating power roles (charging vs. providing power) and wattage levels between the laptop and connected devices. Alternate Modes: Managing high-speed data protocols like DisplayPort Thunderbolt over the USB-C port. Data Role Swapping:
Enables a single USB-C port to handle charging, high-speed data transfer, and video output simultaneously if supported by the hardware.
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