You can often find the official driver directly from Microsoft:
sudo update-grub
If you see this as an "Unknown Device" in Device Manager, follow these steps to resolve it. 1. Identify and Download the Driver acpi fnbt0000 driver fix
If you have recently opened your Windows Device Manager, scrolled down to "Other Devices," and spotted a yellow exclamation mark next to a device labeled or "Unknown Device" with that hardware ID, you are not alone. You can often find the official driver directly
This enables the On-Screen Display (OSD) for volume and brightness. scrolled down to "Other Devices
Visit the Microsoft Update Catalog and search for .