Pnp0ca0
USB-C ports do not simply output high wattages automatically. The driver monitors the safe negotiation of voltages and currents between the host machine and peripheral hardware. This ensures a laptop can accept a 65W, 100W, or higher charge safely without damaging internal cells. 2. Smart Charging Alerts
Did this issue start after a specific or hardware change?
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The Advanced Configuration and Power Interface (ACPI) exposes this hardware configuration to the operating system using the identifier PNP0CA0 .
. In Linux and other modern operating systems, this interface allows the OS to communicate with the hardware to manage USB-C features like power delivery, data roles, and alternate modes (like DisplayPort). Framework Community Below is a guide on how to identify and troubleshoot on your system. 1. Identify the Device USB-C ports do not simply output high wattages automatically
: This hardware object is ubiquitous across modern desktop motherboards (including ASUS ROG, Gigabyte, and MSI series) and high-end laptops from HP, Lenovo ThinkPad, and Acer. Core Functions of the UCSI ACPI Interface
a. Open Device Manager (Press the Windows key + X and select Device Manager). b. In the Device Manager, expand the " Network adapters" or "Other devices" section. c. Right-click on the "pnp0ca0" device and select "Disable device". such as your graphics card
is a standardized hardware ID used by the Windows operating system to identify the UCM-UCSI ACPI Device . It plays a critical role in managing modern USB Type-C ports , handling crucial hardware features such as USB Power Delivery (USB PD), Alternate Modes (like DisplayPort or HDMI output over USB-C), and dynamic power/data role swapping.
When a user connects a USB-C to DisplayPort cable or an external monitor to a laptop, the PNP0CA0 device acts as the software coordinator. It instructs the hardware controller to re-route internal lanes so the port can stream high-definition video signals. 3. Data and Power Role Swapping
This is the "highway" on your motherboard that connects your CPU to various high-speed components, such as your graphics card, NVMe drives, and USB controllers.
sudo sensors-detect
