My Microsoft Surface Book 3 15" laptop just updated to Windows 10, version 2004. After the update, there's a new "Unknown device" device listed in Device Manager. It didn't exist before today (August 15, 2020):
According to the device properties, there is no driver installed for this device. Clicking "update driver" and searching my PC or Windows Update does not find a driver, or do anything to help identify the device.
When I go to the "Details" tab and scroll through the property dropdown, I can see that the device has a Hardware Id of "Root\SQExtFramebufferUmode" and a device instance path of "ROOT\SQEXTFRAMEBUFFER\0000". None of the other properties seem particularly helpful in identifying the device.
Some other info that might be helpful: Other than the Surface Book 3 built-in hardware, I have a Surface Dock 2 attached to my machine, and attached to that is a Corsair K68 USB keyboard, a Logitech M500s USB mouse, and a Dell U3419W monitor connected via USB-C to one of the monitor ports on the Surface Dock 2. The only other devices I have that are sometimes connected are a pair of Bose NC700 headphones, and an X-Box Wireless Controller Adapter, but neither of those devices were attached when this screenshot was taken.
Can anyone tell me what this device might be, and how I can obtain drivers for it?
