10. The Device Configuration Assistant and the kdmconfig Program
The Device Configuration Assistant and some of the BEFs can auto-identify video display devices in the kdmconfig program. There is a special enumerator called vgaprobe that looks for the video display device that is attached and gathers as much information as possible about that device. The gathered information is attached to the device tree node as
properties that kdmconfig later retrieves and uses to identify the video display device.
The keyboard, mouse, and serial port BEFs also perform similar actions and attach properties to the keyboard and mouse device nodes to aid kdmconfig auto-identify those devices. The VGA probe and keyboard and mouse BEFs
(and the serial port BEF) are run on every boot. This is to aid kdmconfig in automatically detecting changes in installed graphics hardware. This allows the graphics environment startup code to warn the user and potentially avert locking up the system if any of the graphics hardware has indeed been changed.
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