User`s guide

Using a VGA Controller Other than the Standard On-Board VGA
When the system is configured to use a PCI- or EISA-based VGA controller
instead of the standard on-board VGA (CIRRUS), consider the following:
The on-board CIRRUS VGA options must be set to disabled through the ECU.
The VGA jumper (J27) on the upper-left corner of the motherboard must then
be set to disable (off).
The console environment variable should be set to graphics.
If there are multiple VGA controllers, the system will direct console output to
the first controller it finds.
5–38 System Configuration and Setup