Acpi Fnbt0000 Driver
Each Hardware ID is assigned to a particular device by the device manufacturer. Windows operating systems such as Windows 11 use the Hardware ID to match to a specific INF file. INF files are used to install the correct device drivers - that's the software that lets your computer communicate with the device in the most efficient manner.
Acpi Fnbt0000 Driver
While a particular device driver is associated with specific Hardware ID, that driver may be compatible with other devices as well. In that case, the INF file would identify one or more Hardware IDs as an exact match, and provide a list of Compatible Hardware IDs for that driver. In many cases, the Compatible Hardware IDs will look similar, with the identifier having only minor variations, particularly in the Device ID portion.
Once you download your new driver, then you need to install it. To install a driver in Windows, you will need to use a built-in utility called Device Manager. It allows you to see all of the devices recognized by your system, and the drivers associated with them.
If you are having trouble finding the right driver, stop searching and fix driver problems faster with the Automatic Driver Update Utility. Many computer problems are caused by missing or outdated device drivers, especially in Windows 11. If your deskttop or laptop is running slow, or keeps crashing or hanging, there is a good chance that updating your drivers will fix the problem. Automatic updates could save you hours of time.
While talking in the mailing list with the maintainer of the CMPC driver, I also found the reason why the extra keys were not working. The driver for the keys was expecting to handle a device with identifier FnBT0000, but at some point the ACPI support in the kernel changed to report always uppercase identifiers, so the device was reporting FNBT0000. Of course, the comparation is case sensitive, so the driver was not matching the device.Fixing this was quite easy, so I sent this second patch for it, and it was also integrated.
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Many hardware names are usually named after the chip model, and each chip model has its own dedicated driver, so as long as you know the chip model used by the hardware, you can find the right driver. For example, if your graphics card is named: "AMD Radeon RX 580", while actually the core chip model used is: "Radeon RX 580", then enter "Radeon RX 580" or "RX 580" to find the driver.
If you have a laptop or an all-in-one PC, you can also use the product name to search, and then go to the download page which has all the drivers for this machine (including: graphics card, network card, sound card, etc.). For example, if your laptop product name is: "Dell A6-9220e Inspiron Flagship", then type "Dell A6-9220e" to find all the drivers for this laptop.