: Communicating target pulse-width modulation (PWM) values to the super I/O chip to dynamically adjust cooling fans.
The System Management Bus (SMBus) is a secondary bus architecture derived from I2Ccap I squared cap C
: Indicates a system modification—such as a custom INF override, a modified ACPI table, or a registry patch—applied to force compatibility or resolve an OS reporting bug. Why the "Patched" Error or Driver Missing Status Occurs
SMBus (System Management Bus) Controller for Intel 8 Series (Haswell) chipsets. pci ven8086 ampdev8c22 ampsubsys309f17aa amprev04 patched
The "patched" INF script altered lines without regenerating a valid security catalog file ( .cat ).
— The OEM Fingerprint
If you discover such an entry in your Device Manager under a device with a yellow exclamation mark, the best course of action is to reinstall the official chipset drivers from your motherboard or PC manufacturer. Using pnputil /enum-devices /bus PCI /deviceids in an administrative command prompt can help you list all such identifiers on your system. If the issue persists, it is a matter worth investigating further with dedicated system analysis tools to understand exactly which piece of hardware is presenting this unusual signature. The "patched" INF script altered lines without regenerating
For device manufacturers and developers, a patched device can mean a reduction in support requests and warranty claims. By proactively addressing issues and releasing patches, manufacturers can reduce the number of devices that need to be repaired or replaced, saving time and resources.
Install the package. This will apply the correct naming protocol to Device ID 8C22 and clear the system flags. Lenovo model
Enter your machine's unique or use their automated detection tool. Access the Drivers & Software menu panel. If the issue persists, it is a matter
The term in this context often refers to using the Intel Chipset Device Software (INF Update Utility) to provide the OS with the correct naming and configuration for the hardware, rather than a traditional functional "driver" that controls the device. How to Install the Correct Driver
The most effective fix involves updating the system definitions using the official Intel INF files. Navigate to the official Intel Download Center.
In short, while it's not a powerhouse like your graphics card, the SMBus controller is essential for the system's stability and health monitoring. The Linux kernel supports this device out-of-the-box on many distributions, as the necessary drivers (like i2c-i801 ) are included and enabled by default.
Click , navigate to your extracted patched folder, select the corresponding .inf file, and confirm the installation over the OS warnings. Troubleshooting Common Errors